25. Solve [(4x' 3x +2x+5)dr ) 3 b) 5 d) 9 d'y, 26. If y = sin x then find dx? a) cos x (b)-sin x c) sin x cosx d) tan x 7. If y = 4x' 2x? +2x+ 7 then find d'y at x 2? dx a) 22 (b) 12 c) 44 d) 8 8. The sides of an equilateral triangle are increasing at the rate of 2cms'. Find the which the area increases when the side is 10cm? a 10/3 cm / sec b) 5/3 cm / sec c) 20 cm? / sec d) 10cm? / sec Differentiate the function (5x +6)(2x' +4) with respect to x? 3 50x* +36x +40x b) 25x +18x + 20x c) 10x* +9x +10x d) 15x* +30x? +10x . Differentiate the fction x- 1 with respect to x? Vr 1 x- r+1 c) 2V Vx(x+1