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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
Sure, let’s solve the given problem step by step.

We are given the function:
[tex]\[ f(x) = 2x^2 + 1 \][/tex]

We need to find \( f(x) \) when \( x = 3 \).

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

2. Calculate the exponent:
[tex]\[ (3)^2 = 9 \][/tex]

3. Multiply by the coefficient 2:
[tex]\[ 2 \times 9 = 18 \][/tex]

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

Therefore, \( f(3) \) is 19.

So the correct answer is:
[tex]\[ 19 \][/tex]

Answer:

hello

Step-by-step explanation:

If f(x) = 2x²+1

f(3)= 2*(3)²+1

=2*9 +1

=18+1

=19

if f(x)=2x²+1 f(x) when x=3 is : 19

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