Balbharti 12th Maharashtra State Board Maths Solutions Book Pdf Chapter 3 Indefinite Integration Ex 3.1 Questions and Answers.

## Maharashtra State Board 12th Maths Solutions Chapter 3 Indefinite Integration Ex 3.1

I. Integrate the following functions w.r.t. x:

(i) x^{3} + x^{2} – x + 1

Solution:

(ii) \(x^{2}\left(1-\frac{2}{x}\right)^{2}\)

Solution:

(iii) \(3 \sec ^{2} x-\frac{4}{x}+\frac{1}{x \sqrt{x}}-7\)

Solution:

(iv) \(2 x^{3}-5 x+\frac{3}{x}+\frac{4}{x^{5}}\)

Solution:

(v) \(\frac{3 x^{3}-2 x+5}{x \sqrt{x}}\)

Solution:

II. Evaluate:

(i) ∫tan^{2} x . dx

Solution:

(ii) \(\int \frac{\sin 2 x}{\cos x} \cdot d x\)

Solution:

(iii) \(\int \frac{\sin x}{\cos ^{2} x} \cdot d x\)

Solution:

(iv) \(\int \frac{\cos 2 x}{\sin ^{2} x} \cdot d x\)

Solution:

(v) \(\int \frac{\cos 2 x}{\sin ^{2} x \cdot \cos ^{2} x} \cdot d x\)

Solution:

= -cot x – tan x + c

(vi) \(\int \frac{\sin x}{1+\sin x} \cdot d x\)

Solution:

(vii) \(\int \frac{\tan x}{\sec x+\tan x} \cdot d x\)

Solution:

(viii) \(\int \sqrt{1+\sin 2 x} \cdot d x\)

Solution:

(ix) \(\int \sqrt{1-\cos 2 x} \cdot d x\)

Solution:

(x) ∫sin 4x cos 3x dx

Solution:

III. Evaluate:

(i) \(\int \frac{x}{x+2} \cdot d x\)

Solution:

(ii) \(\int \frac{4 x+3}{2 x+1} \cdot d x\)

Solution:

(iii) \(\int \frac{5 x+2}{3 x-4} \cdot d x\)

Solution:

(iv) \(\int \frac{x-2}{\sqrt{x+5}} \cdot d x\)

Solution:

(v) \(\int \frac{2 x-7}{\sqrt{4 x-1}} \cdot d x\)

Solution:

(vi) \(\int \frac{\sin 4 x}{\cos 2 x} \cdot d x\)

Solution:

(vii) \(\int \sqrt{1+\sin 5 x} \cdot d x\)

Solution:

(viii) ∫cos^{2} x . dx

Solution:

(ix) \(\int \frac{2}{\sqrt{x}-\sqrt{x+3}} \cdot d x\)

Solution:

(x) \(\int \frac{3}{\sqrt{7 x-2}-\sqrt{7 x-5}} \cdot d x\)

Solution:

IV.

Question 1.

If f'(x) = x – \(\frac{3}{x^{3}}\), f(1) = \(\frac{11}{2}\), find f(x).

Solution:

By the definition of integral,