x যদি -1 হয়, তবে 3x³ + 2x2 + x + 1 = কত?

x যদি -1 হয়, তবে 3x³ + 2x² + x + 1 = কত?

A - 5

B 1

C -1

D 3

Correct Answer: Option C

x = -1 হলে,

3x³ - 2x² + x + 1
= 3(-1)³ - 2(-1)² + (-1) + 1
= 3.(-1) + 2.1- 1 + 1
= -3 + 2 - 1 + 1
= -1