Question

4. Find the value of f(x)= 4x -3x? +5x+7 at

(a)

(x= 1)

(b) x =-2

(C) x=1/2​

Answer 1

Answer:

if x=1

4(1)-3(1)+5(1)+7

4-3+5+7

1+5+7

x=13

if x=-2

4(-2)-3(-2)+5(-2)+7

-8+6-10+7

-18+13

x=-5

if x=1/2

4(1/2)-3(1/2)+5(1/2)+7

2-1.5+2.5+7

0.5+2.5+7

x=10