Y=(3X+2)^3 COS(X)

y=(3x+2)^3cosx

=>dy/dx

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

=3(3x+2)^2 *d(3x+2)/dx *cosx-sinx(3x+2)^3

=9(3x+2)^2*cosx-sinx*(3x+2)^3

=(3x+2)^2(9cosx-(3x+2)sinx)//

求 (3X+2)^3 COS(X) 的導數?

Y=[(3X+2)^3]*COS(X)??

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