se f(x) = 2+x-x^2 Calcula F'(0), F'(1/2), F'(1) e F'(-10)
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f(x) = 2 + x - x²
f'(x) = 0 + 1 - 2x
f'(x) = 1 - 2x
f'(0) = 1 - 2.0
f'(0) = 1
f'(1/2) = 1 - 2.(1/2)
f'(1/2) = 1 - 1
f'(1/2) = 0
f'(1) = 1 - 2.1
f'(1) = -1
f'(-10) = 1 - 2.(-10)
f'(-10) = 1 - (-20)
f'(-10) = 1 + 20
f'(-10) = 21
f'(x) = 0 + 1 - 2x
f'(x) = 1 - 2x
f'(0) = 1 - 2.0
f'(0) = 1
f'(1/2) = 1 - 2.(1/2)
f'(1/2) = 1 - 1
f'(1/2) = 0
f'(1) = 1 - 2.1
f'(1) = -1
f'(-10) = 1 - 2.(-10)
f'(-10) = 1 - (-20)
f'(-10) = 1 + 20
f'(-10) = 21
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