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∫x2−4(x+2)(x−1)(x−3)dx=\int \frac{x^2 - 4}{(x+2)(x-1)(x-3)} dx =

Solution

✅ Correct Option: 3

x2−4(x+2)(x−1)(x−3)=(x−2)(x+2)(x+2)(x−1)(x−3)=x−2(x−1)(x−3)\frac{x^2 - 4}{(x+2)(x-1)(x-3)} = \frac{(x-2)(x+2)}{(x+2)(x-1)(x-3)} = \frac{x-2}{(x-1)(x-3)}. Partial fractions: x−2(x−1)(x−3)=1/2x−1+1/2x−3\frac{x-2}{(x-1)(x-3)} = \frac{1/2}{x-1} + \frac{1/2}{x-3}. Integral =12log⁡∣x−1∣+12log⁡∣x−3∣+C=12log⁡e∣C(x−1)(x−3)∣= \frac{1}{2}\log|x-1| + \frac{1}{2}\log|x-3| + C = \frac{1}{2}\log_e |C(x-1)(x-3)|.

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