Answer:
d. 19
Step-by-step explanation:
f(x)=2x^2+1
f(3)=2(3^2)+1
f(3)=2(9)+1
f(3)=18+1
f(x)=19
f(x) will be 19 at x=3.
To get the value of the function we have to put the value of x in the function and substitute the value of x in the place of x.
So according to the question,
we have to find the value of f(x) when x=3
where f(x)=2x²+1
substituting the value of x i.e. 3 in the place of x
f(3)=2(3²)+1
=(2*9)+1
=18+1
=19
Therefore f(x) will be 19 at x=3.
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