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f´(x) = -2(2)x^(2-1) + 2´
f´(x) = -4x¹+ 0
f´(x) = -4x
b) f(x) = 2x + 1
f´(x) = 2x´ + 1´
f´(x) = 2(1) + 0
f´(x) = 2
c) f(x) = -5x
f´(x) = -5x´
f´(x) = -5(1)
f´(x) = -5