f(x) = x² + 5x - 7
f¹(-1) = ..?
maka :
f¹(-1) = (-1)² + 5(-1) - 7
= 1 + (-5) - 7
= -(1 - 5) - 7
= (-4) - 7
= -(4 + 7)
= -11
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f(x) = x² + 5x - 7
f¹(-1) = ..?
maka :
f¹(-1) = (-1)² + 5(-1) - 7
= 1 + (-5) - 7
= -(1 - 5) - 7
= (-4) - 7
= -(4 + 7)
= -11