Solución 1
\[f(x) = 5\]
\[f'(x) = \boxed{0}\]
Solución 2
\[f(x) = x\]
\[f'(x) = \boxed{1}\]
Solución 3
\[f(x) = 7x\]
\[f'(x) = \boxed{7}\]
Solución 4
\[f(x) = x^{6}\]
\[f'(x) = \boxed{6x^{5}}\]
Solución 5
\[f(x) = -9x^{4}\]
\[f'(x) = \boxed{-36x^{3}}\]
Solución 6
\[f(x) = 7x^{3}\]
\[f'(x) = \boxed{21x^{2}}\]
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