Question

求下列函数的导数(1)y=2 x e^x + x^4(2)y=sin2x/(根号下2x-1)(3)y=cosx·cos2

Answer 1

1.2(1+x)e^x + 4x^3

2.2*cos(2*x)/(2*x-1)^(1/2)-sin(2*x)/(2*x-1)^(3/2)

3.-sin(x)*cos(2*x)-2*cos(x)*sin(2*x)

4.4^(x-1/2)*ln(4)-2^(x+1)*ln(2)