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Introduction

If fx = x2 + ...

Question

If f(x) = x $^{2}$ + 4x - 1, find the value of f(5).
44

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Solution

The correct option is A 44
Given: f(x) = x $^{2}$ + 4x - 1

At x = 5,
f(5) = 5 $^{2}$ + 4(5) - 1
f(5) = 25 + 20 - 1 = 44

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