Integration of 1/√(x-a)(x-b)
To integrate the expression 1/√(x-a)(x-b) with respect to x, we can use a method called partial fraction decomposition. This technique allows us to express the given expression as a sum of simpler fractions that we can integrate individually.
Step 1: Partial Fraction Decomposition
To begin, we factor the denominator (x-a)(x-b) to get two linear factors. The partial fraction decomposition of 1/√(x-a)(x-b) is given by:
1/√(x-a)(x-b) = A/√(x-a) + B/√(x-b)
Here, A and B are constants that we need to find.
Step 2: Finding the Constants A and B
To find the values of A and B, we need to equate the numerators of the fractions in the partial fraction decomposition to the original numerator, which is 1. This gives us the following equation:
1 = A√(x-b) + B√(x-a)
To simplify the equation, we can square both sides:
1 = A^2(x-b) + 2AB√(x-a)(x-b) + B^2(x-a)
Since the equation holds for all values of x, the coefficients of each power of x must be equal. This leads to the following system of equations:
A^2 + B^2 = 0 (coefficient of x^0)
2AB = 0 (coefficient of x^1)
From the second equation, we can see that either A or B must be zero. However, since A^2 + B^2 = 0, both A and B must be zero.
Therefore, we conclude that A = 0 and B = 0.
Step 3: Integration
With A = 0 and B = 0, the partial fraction decomposition becomes:
1/√(x-a)(x-b) = 0/√(x-a) + 0/√(x-b) = 0
The integral of 0 with respect to x is simply a constant, so the final result of the integration is:
∫ 0 dx = C
Here, C represents the constant of integration.
Final Result
Therefore, the integral of 1/√(x-a)(x-b) with respect to x is C, where C is the constant of integration.