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If f(x) = x³ - x² + x + 1 then f(2) = ____?
  1. 5
  2. 7
  3. 3
  4. None of these
Explanation

Let's evaluate f(2) for the function f(x)=x3−x2+x+1.

Substitute x=2 into the function:

f(2)=(2)3−(2)2+(2)+1

Calculate step by step:

  • 23=8

  • 22=4

  • So, 8−4=4

  • Then, 4+2=6

  • Finally, 6+1=7

Therefore, f(2)=7.

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