Question

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Letf(x)=13x2-x. Find f(x+1)-f(x).
f(x+1)-f(x)=
(Simplify your answer. Do not factor.)

Answer 1

Answer:

f(x + 1) - f(x) = 13(x + 1)² - (x + 1) - (13x² - x)

= 13x² + 26x + 13 - x - 1 - 13x² + x

= 26x + 12