## PART – 1

https://www.dailymotion.com/video/x7e9ywq

**This part is based on following particular functions:\( int frac{1}{x^2-a^2} dx = frac{1}{2a} log left | frac{x-a}{x+a} right | + C \)**

**\( int frac{1}{a^2-x^2} dx = frac{1}{2a} log left | frac{a+x}{a-x} right | + C \)**

**\( int frac{1}{x^2+a^2} dx = frac{1}{a} tan ^{-1} frac{x}{a} + C \)**

**\( int frac{1}{sqrt{x^2 pm a^2}} dx = log left | x + sqrt{x^2 pm a^2} right | + C \)**

**\( int frac{1}{sqrt{a^2-x^2}} dx = sin ^{-1} frac{x}{a} + C \)**

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## PART – 2

https://www.dailymotion.com/video/x7e9ywr

**Questions discussed in this lecture:1. \( int frac{3x^2}{x^6+1} dx \)**

**2. \( int frac{1}{sqrt{1+4x^2}} dx \)**

**3. \( int frac{1}{sqrt{(2-x)^2+1}} dx \)**

**4. \( int frac{1}{sqrt{9-25x^2}} dx \)**

**5. \( int frac{3x}{1+2x^4} dx \)**

**6. \( int frac{x^2}{1-x^6} dx \)**

**7. \( int frac{x-1}{sqrt{x^2-1}} dx \)**

**8. \( int frac{x^2}{sqrt{x^6+a^6}} dx \)**

**9. \( int frac{sec^2 x}{sqrt{tan^2 x+4}} dx \)**

## PART – 3

https://www.dailymotion.com/video/x7eh6tx

**Questions discussed in this lecture:10. \( int frac{1}{sqrt{x^2+2x+2}} dx \)**

**11. \( int frac{1}{9x^2+6x+5} dx \)**

**12. \( int frac{1}{sqrt{7-6x-x^2}} dx \)**

**13. \( int frac{1}{sqrt{(x-1)(x-2)}} dx \)**

**14. \( int frac{1}{sqrt{8+3x-x^2}} dx \)**

**15. \( int frac{1}{sqrt{(x-a)(x-b)}} dx \)**

## PART – 4

https://www.dailymotion.com/video/x7ehbuc

**Questions discussed in this lecture:17. \( int frac{x+2}{sqrt{x^2-1}} dx \)**

**18. \( int frac{5x-2}{1+2x+3x^2} dx \)**

## PART – 5

https://www.dailymotion.com/video/x7ehbud

**Questions discussed in this lecture:19. \( int frac{6x+7}{sqrt{(x-5)(x-4)}} dx \)**

**20. \( int frac{x+2}{sqrt{4x-x^2}} dx \)**