If x = g(y)
∫ f(x) dx = ∫ f(g(y))g'(y) dy
This is called change of variables.
d/dx ∫ f(x) dx = f(x)
∫ f'(x)/f(x) dx = ln(f(x)) + C C is the constant of integration.
∫ af(x) dx = a ∫ f(x) dx
if you are integrating with respect to x, the indefinite integral of 1 is just x
The definite integral of a function: y = f(x) from x = a to x = b is equal to the area between the function curve and the 'x' axis from x = a to 'x' = b.
The integral of the function 1 sinc(x) with respect to x is x - cos(x) C, where C is the constant of integration.
d/dx ∫ f(x) dx = f(x)
∫ f'(x)/f(x) dx = ln(f(x)) + C C is the constant of integration.
∫ d/dx f(x) dx = f(x) + C C is the constant of integration.
∫ af(x) dx = a ∫ f(x) dx
∫ f'(x)g(x) dx = f(x)g(x) - ∫ f(x)g/(x) dx This is known as integration by parts.
The integral of X 4Y X 8Y 2 With respect to X is 2ln(10/9).
if you are integrating with respect to x, the indefinite integral of 1 is just x
∫ f(x)nf'(x) dx = f(x)n + 1/(n + 1) + C n ≠-1 C is the constant of integration.
The definite integral of a function: y = f(x) from x = a to x = b is equal to the area between the function curve and the 'x' axis from x = a to 'x' = b.
The only function that can be symmetric about the x-axis is the x-axis itself. For each value of x a function, f(x), can have at most one value for f(x). Otherwise it is a mapping or relationship but not a function.
With respect to x, this integral is (-15/2) cos2x + C.