Question

If f(x) = 2x2 + 1, what is f(x) when x = 3?

1
7
13
19

Answer 1

f(X)=2x²+1

To find f(X) when X=3

f(3)=2(3)²+1=2(9)+1=18+1=19

Hope this answer is useful to you...

Answer 2

Answer:

f(x)=2x+1

sum 2x+1

x=1

2(1)+1=3

2x+1=3

x=1^- x=1^+

hence,the function is continuous atx=1