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f(x) = (u)^n------> f'(x) = n.(u)^n-1.u'
1). y = sin^3 (2x-4)
= 3 sin^2 (2x-4) cos (2x-4).2
= 6 sin^2 (2x-4) cos (2x-4)
3). f(x) = cos^3 x
= 3.cos^2 x.-sin x.1
= -3 cos^2x sin x
4). f(x)= cos^2(3x+6)
= 2.cos (3x+6) -sin (3x+6).3
= -6 cos (3x+6) sin (3x+6)
6). f(x) = sin^2(2x-3)
= 2 sin (2x-3) cos (2x-3) .2
= 4 sin (2x-3) cos (2x-3)
no.5 dan 7 pakai cara f'(x) =u'.v + u.v'
no. 2 caranya sama pakai aturan rantai.
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