Respuesta :

dalendrk
f(x) = 4sin(x)

f'(x) = [4sin(x)]' = 4[sin(x)]' = 4cos(x)
(
 derivative of 4sin(x)
=(4)'*sin(x)+4*(sin(x))'

=0*sin(x)+4*(sin(x))'

=0*sin(x)+4*cos(x)

=4*cos(x)

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