Answered

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If [tex]\( f(x) = 2x^2 + 1 \)[/tex], what is [tex]\( f(x) \)[/tex] when [tex]\( x = 3 \)[/tex]?

A. 1
B. 7
C. 13
D. 19

Sagot :

GinnyAnswer
To find the value of the function [tex]\( f(x) = 2x^2 + 1 \)[/tex] when [tex]\( x = 3 \)[/tex], follow these steps:

1. Substitute [tex]\( x = 3 \)[/tex] into the function:
[tex]\[ f(3) = 2(3)^2 + 1 \][/tex]

2. First, compute the square of 3:
[tex]\[ 3^2 = 9 \][/tex]

3. Next, multiply 9 by 2:
[tex]\[ 2 \times 9 = 18 \][/tex]

4. Finally, add 1 to the result:
[tex]\[ 18 + 1 = 19 \][/tex]

Thus, [tex]\( f(3) = 19 \)[/tex].

So, the value of [tex]\( f(x) \)[/tex] when [tex]\( x = 3 \)[/tex] is [tex]\( 19 \)[/tex]. The correct answer is [tex]\( 19 \)[/tex].
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