Question

If p(x) = 2x3 – x2 + 3x + 1, then find the value of "
p(-1)+p(1)/2​

Answer 1

Answer:

-7.5

Step-by-step explanation:

p(-1)=2(-1)-1-3+1=-2-3=-5

p(1)=2-1+3+1=5

p(-1)+p(1)/2=-5+5/2=-5+2.5=-7.5

Answer 2

P(x) = 2x³ - x² + 3x + 1

• P(-1) = 2 x ( - 1 )³ - ( - 1 ) ² + 3 x - 1 + 1

- 2 - 1 - 3 + 1

- 6 + 1 = - 5

• P(1/2) = 2 x ( ½ )³ - ( ½ )² + 3 x ½ + 1

2 x ⅛ - ¼ + 3/2 + 1

¼ - ¼ + 3/2 + 2/2

3/2 + 2/2 = 5/2