Question

if f(x) = ax2 +bx+c and f(1)=0 and f(-1)=5, then find the value of a+c​

Answer 1

Answer:

a+c=5/2

Step-by-step explanation:

f(x) = ax2 +bx+c

f(1)=a*1+b*1+c=0

a+b+c=0...........(1)

f(-1) =a(-1)²+b(-1)+c=5

a-b+c=5.................(2)

add (1) and (2)

2a+2c=5

2(a+c)=5

a+c=5/2

Answer 2

let x +1 = 0 1-5 = 4 - 2.5

answer 2.5