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TS EAMCET · Maths · Indefinite Integration

\(\begin{aligned} & \text { If } 5(f(x))^2=x f(x)+30 \text { and } \ & \int \frac{\left(3 x^3+\left(1-30 x^2\right) f(x)\right)}{(10 f(x)-x)\left(x^3-f(x)\right)^2} d x \ & =\frac{A}{B x^3+D f(x)}+C \text { then } A+B+D=\end{aligned}\)

  1. A 2
  2. B 1
  3. C \(\frac{1}{2}\)
  4. D -1
Verified Solution

Answer & Solution

Correct Answer

(B) 1

Step-by-step Solution

Detailed explanation

We have, \(\begin{aligned} & 5(f(x))^2=x f(x)+30 \Rightarrow 10 f(x) f^{\prime}(x)=x f^{\prime}(x)+f(x) \\ & \Rightarrow \quad(10 f(x)-x) f^{\prime}(x)=f(x) \end{aligned}\) Now,…