Given f(x)=1/2(3-x)^2,
what is the value of f(15)?
We can start by plugging in 15 for x in the given function:
f(15) = 1/2(3-15)^2
Simplifying inside the parentheses first:
f(15) = 1/2(-12)^2
Squaring -12:
f(15) = 1/2(144)
Multiplying 1/2 by 144:
f(15) = 72
Therefore, f(15) = 72.
To find the value of f(15) when f(x) = 1/2(3-x)^2, we need to substitute x = 15 into the equation.
Substituting x = 15 into the equation, we have:
f(15) = 1/2(3-15)^2
Simplifying inside the parentheses:
= 1/2(-12)^2
= 1/2(144)
= 72
Therefore, the value of f(15) is 72.