In polynomial P(x) = ax³ + bx² + cx + d, P(1) =P(-1), find a + c
A-1
B1
C0
D2
Answer:
C. 0
Read Explanation:
P(x) = ax³ + bx² + cx + d
P(1) = P(x) = a× 1³ + b× 1 ² + c× 1 + d
= a + b + c + d
P(-1) = a× -1³ + b× -1 ² + c× -1 + d
= -a + b -c + d
Since P(1) = P( -1)
a + b + c + d = -a + b + -c + d
2a + 2c = 0
a + c = 0
