Question

Consider the function f(x) = 5x + 7. A) f(1) − f(3) = f(3) − f(1) B) f(1) − f(3) = f(5) − f(3) C) f(1) − f(3) = f(3) − f(5) D) f(1) − f(3) = f(−1) − f(−3)

Answer 1

Answer:

Step-by-step explanation:

Answer is C

As f(1)-f(3)=5(1)+7-5(3)-7=-10

And f(3)-f(5)=5(3)+7-5(5)-7=-10

As both are equal so option c is correct

Answer 2

Answer:

-5

Step-by-step explanation:

x

=

1

and  

x

=

2

are zeros of  

f

(

x

)

=

3

x

3

+

A

x

2

+

B

x

+

2

This implies

f

(

1

)

=

0

3

+

A

+

B

+

2

=

0

A

+

B

=

−

5

Therefore the value of A+B is equal to -5.