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Given the function f(x) = 2x + 7. Find f...

Given the function f(x) = 2x + 7. Find f(0), f(5), f(7).

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Given that f(x) = 2x + 7
`:.` f(0) = 7
f(5) = 2(5) + 7 = 17
f(7) = 2(7) + 7 = 21
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