If f(x) = x2 – x + 1 then f(x + 1) is: (a) x2 (b) x (c) 1 (d) x2

1.	If f(x) = x2 – x + 1 then f(x + 1) is: (a) x2 (b) x (c) 1 (d) x2 + x + 1
Answer» (d) x² + x + 1 f(x) = x² – x + 1 f(x + 1) = (x + 1)² – (x + 1) + 1 = x² + 2x + 1 – x – 1 + 1 = x² + x + 1

If f(x) = x2 – x + 1 then f(x + 1) is: (a) x2 (b) x (c) 1 (d) x2 + x + 1

Answer»

(d) x² + x + 1

f(x) = x² – x + 1

f(x + 1) = (x + 1)² – (x + 1) + 1

= x² + 2x + 1 – x – 1 + 1

= x² + x + 1