High School

If [tex]f(x)=\frac{1}{2} x^2-3[/tex], find [tex]f(6)[/tex].

A. 21
B. 3
C. 15
D. 69

Answer :

We are given the function

[tex]$$
f(x) = \frac{1}{2} x^2 - 3.
$$[/tex]

To find [tex]\( f(6) \)[/tex], we substitute [tex]\( x = 6 \)[/tex] into the function:

1. Compute the square of 6:

[tex]$$
6^2 = 36.
$$[/tex]

2. Multiply the result by [tex]\( \frac{1}{2} \)[/tex]:

[tex]$$
\frac{1}{2} \times 36 = 18.
$$[/tex]

3. Subtract 3:

[tex]$$
18 - 3 = 15.
$$[/tex]

Thus, the value of [tex]\( f(6) \)[/tex] is [tex]\( \boxed{15} \)[/tex].