Question

1. Differential equations 2 puc math

English class 6 true height

Differentiate sin (2x+1) w.r.t.x from first principal

Differentiate sin (2x+1)from first principal

(x +4/x ^2+4x +3)-(2/x +1)-(x +1/x ^2-x +1)>=-(3x /x ^3+1)

(x +4/x ^2+4x +3)-(2/x +1)-(x +1/x ^2-x +1)>=-(3x /x ^3+1)■

1. Very long answer . 
2. Can be short it.

The coefficients of three consecutive terms in the expansion of 1 an are in the ratio 1:7:42 .Find ‘n’ and ‘r’.

9x2+7x_2=0

dx/cos(x+y)=dy/sin(x+y)=dz/z