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Question
If f(x) = x2 – x + 1 then f(x + 1) is:
Options
x2
x
1
x2 + x + 1
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Solution
x2 + x + 1
Explanation:
f(x) = x2 – x + 1
f(x + 1) = (x + 1)2 – (x + 1) + 1
= x2 + 2x + 1 – x – 1 + 1
= x2 + x + 1
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