To find the indefinite integral of the given function, we will break it down into two separate integrals:
∫ (x – 3/x^2) dx = ∫ x dx – ∫ (3/x^2) dx
Taking the integral of x with respect to x gives us:
∫ x dx = (1/2)x^2 + C1
Next, let’s find the integral of 3/x^2 with respect to x. We can rewrite this as:
∫ 3x^(-2) dx
Using the power rule of integration, the integral of x^(-n) with respect to x is x^(-n+1)/(1-n), except when n = 1. Thus, we have:
∫ 3x^(-2) dx = 3(x^(-2+1))/(1-2) + C2
= -3x^(-1) + C2
= -3/x + C2
Combining the two integrals, we get:
∫ (x – 3/x^2) dx = (1/2)x^2 – 3/x + C
Therefore, the indefinite integral of x – 3/x^2 is (1/2)x^2 – 3/x + C, where C is the constant of integration.
Boost your grades with A level Maths Easter Revision Course