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2 April, 10:47

On the xy-plane, the graph of function f has x-intercepts at - 3, - 1, and 1. which of the following could define f?

A) f (x) = (x-3) (x-1) (x+1)

B) f (x) = (x-3) (x-1) ^2

C) f (x) = (x-1) (x+1) (x+3)

D) f (x) = (x+1) ^2 (x+3)

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  1. 2 April, 11:16
    0
    X intercept is when y=0

    or f (x) = 0

    set the f (x) 's to 0

    your answer is C

    x-1=0 x+1=0 x+3=0

    so x = - 3, - 1, and 1
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