# 25 Lecture

## Integrations

Integrations are a fundamental concept in calculus and analytical geometry that involve finding the area under a curve. They play an important role in a wide range of fields, including physics, engineering, and economics.

## Important Mcq's Midterm & Finalterm Prepration Past papers included

What is integration?

a. The process of finding the derivative of a function.

b. The process of finding the limit of a function.

c. The process of finding the area under a curve between two points.

d. The process of finding the slope of a tangent line.

Solution: c. The process of finding the area under a curve between two points is called integration.

What is the difference between a definite and indefinite integral?

a. A definite integral gives a function whose derivative is the original function.

b. A definite integral gives a specific numerical value for the area under a curve between two points.

c. A definite integral gives the slope of a tangent line to a curve at a specific point.

d. A definite integral gives the limit of a function as x approaches a specific value.

Solution: b. A definite integral gives a specific numerical value for the area under a curve between two points, while an indefinite integral gives a function whose derivative is the original function.

What is the method of cylindrical shells?

a. A method for finding the area between two curves.

b. A method for finding the arc length of a curve.

c. A method for finding the volume of a solid formed by revolving a curve around an axis.

d. A method for finding the limit of a function.

Solution: c. The method of cylindrical shells is a method for finding the volume of a solid formed by revolving a curve around an axis.

What is an antiderivative?

a. A function whose derivative is the original function.

b. A function whose limit is the original function.

c. A function whose slope is the original function.

d. A function whose area under the curve is the original function.

Solution: a. An antiderivative is a function whose derivative is the original function.

What is the constant of integration?

a. A value that is added to the antiderivative of a function.

b. A value that is subtracted from the antiderivative of a function.

c. A value that is multiplied by the antiderivative of a function.

d. A value that is divided by the antiderivative of a function.

Solution: a. The constant of integration is a value that is added to the antiderivative of a function.

How are integrals used in physics?

a. To find the area between two curves.

b. To find the volume of a solid formed by revolving a curve around an axis.

c. To find the work done by a force.

d. To find the arc length of a curve.

Solution: c. Integrals are used in physics to find the work done by a force.

How is the area between two curves found?

a. By finding the derivative of one curve.

b. By finding the derivative of both curves.

c. By integrating the difference between the two curves.

d. By integrating the sum of the two curves.

Solution: c. The area between two curves is found by integrating the difference between the two curves.

How is the arc length of a curve found?

a. By integrating the length of small segments of the curve.

b. By differentiating the length of small segments of the curve.

c. By finding the area under the curve.

d. By finding the volume of a solid formed by revolving the curve around an axis.

Solution: a. The arc length of a curve is found by integrating the length of small segments of the curve.

What is the relationship between integration and differentiation?

a. Integration and differentiation are unrelated.

b. Integration is the inverse of differentiation.

c. Integration is the same as differentiation.

d. Integration is the

## Subjective Short Notes Midterm & Finalterm Prepration Past papers included

What is integration?

Integration is the process of finding the area under a curve between two points.

What is the difference between definite and indefinite integrals?

Definite integrals give a specific numerical value for the area under a curve between two points, while indefinite integrals give a function whose derivative is the original function.

How are integrals used in physics?

Integrals are used in physics to find the work done by a force.

What is the method of cylindrical shells?

The method of cylindrical shells is a process for finding the volume of a solid formed by revolving a curve around an axis using integrals.

How are integrals used in economics?

Integrals are used in economics to find the total revenue or profit of a company.

What is an antiderivative?

An antiderivative is a function whose derivative is the original function.

How is the constant of integration determined?

The constant of integration is determined by specifying a value for the function at a specific point.

What is the formula for finding the area between two curves?

The formula for finding the area between two curves is A = ? (f(x) - g(x)) dx.

How are integrals used to find the arc length of a curve?

Integrals are used to find the arc length of a curve by integrating the length of small segments of the curve as the curve is traced between two points.

What is the relationship between integration and differentiation?

Integration is the inverse of differentiation, and finding the antiderivative of a function is equivalent to integrating the function.

### Integrations

Integrations are a fundamental concept in calculus and analytical geometry that involve finding the area under a curve. They play an important role in a wide range of fields, including physics, engineering, and economics. In this article, we will discuss the basics of integrations, their applications, and how they are used in calculus and analytical geometry. Integration is the process of finding the area under a curve between two points. It involves adding up an infinite number of small pieces of the curve, or "integrating" them. This process is called integration because it is the inverse of differentiation, which is the process of finding the rate of change of a function at any point. The most basic type of integration is called a definite integral. A definite integral is the area under a curve between two points, and is represented by the integral symbol, which looks like an elongated "S." The limits of integration are placed at the top and bottom of the integral symbol, and indicate the points between which the area is being found. The function being integrated is placed between the integral symbol and the limits of integration. For example, if we want to find the area under the curve y = x^2 between x=0 and x=1, we would write: ??ยน x^2 dx The result of this integral is the area under the curve between x=0 and x=1, which in this case is 1/3. Integrals can also be used to find the volume of a solid formed by revolving a curve around an axis. This process is called the method of cylindrical shells. The volume of the solid can be found by integrating the area of the cross-sections of the solid as the curve is rotated around the axis. Integrals are also used in physics to find the work done by a force. The work done by a force is the product of the force and the distance moved, integrated over the distance moved. This is represented by the formula: W = ? F(x) dx where F(x) is the force and dx is the distance moved. Integrals are also used in economics to find the total revenue or profit of a company. Revenue is the product of the price and the quantity sold, integrated over the quantity sold. Profit is revenue minus cost, so it can also be found by integrating the difference between revenue and cost over the quantity sold. In calculus, integrals are used to find the antiderivative of a function. An antiderivative is a function whose derivative is the original function. The antiderivative of a function can be found by integrating the function. This is represented by the formula: f(x) = ? F(x) dx + C where F(x) is the function to be integrated, f(x) is the antiderivative, and C is the constant of integration. The constant of integration is added to the antiderivative because the derivative of a constant is zero. Therefore, any constant added to an antiderivative will still have the same derivative. In analytical geometry, integrals are used to find the area between two curves. This is represented by the formula: A = ? (f(x) - g(x)) dx where f(x) and g(x) are the two curves and A is the area between them. Integrals are also used to find the arc length of a curve. The arc length is the length of a curve between two points, and can be found by integrating the length of small segments of the curve as the curve is traced between the two points. In conclusion, integrals are a fundamental concept in calculus and analytical geometry that are used to find the area under a curve, the volume of a solid, the work done by a force, the revenue or profit.