The function f(x) is the total amount spent at a store, when purchasing x items that are $5 each and the items are not taxable.
What is the practical domain for the function f(x)?
all whole numbers
all positive integers that are multiples of 5
all real numbers
all positive integers
Which characteristic is correct for the function f(x)=−2x4+3x2 ?
neither even nor odd
both even and odd
All whole numbers [ there is a possibility that nothing is purchased ]
f(x) = -2x^4 + 3x^2
If we just have even powers on a function [ and posssibly, a constant term ] it will always be even
Proof...if even f(x) = f(-x)
f(-x) = - 2(-x)^4 + 3(-x)^2 = -2x^4 + 3x^2 = f(x)