" 20."(d(2^(x)))/(d(3^(x)))=

(d)/(dx)(3x^(2)+2x)=

If (x^(3)+x^(2)+1)/((x^(2)+2)(x^(2)+3))=(Ax+B)/(x^(2)+2)+(Cx+D)/(x^(2)+3) , then A+B+C+D=

(d)/(dx) {Sin ^(-1) ((3x)/(2) - (x ^(3))/(2))}=

differentiate (2)/(x+1)-(x^(2))/(3x-1)

(d^(20))/(dx^(20))(2cosxcos3x)= 2^(20)(cos2x-2^(20)cos4x) (b) 2^(20)(cos2x+2^(20)cos4x) (c) 2^(20)(sin2x+2^(20)sin4x) (d) 2^(20)(sin2x-2^(20)sin4x)

(d^(2))/(dx^(2))(x^(2)+3x+2)= (A) 2x+3 (B) 2 (C) 3 (D) 2x

Maximum value of f(x)=(ln x)^(20)*x^(30) occurs at x=-(2)/(3)( b) x=1x=e^(-(2)/(3))( d) x=e^((2)/(3))