Consider the equation y-2x^2=4+x. Assume that y is a function of x.

Question

Rewrite the equation using function notation f(x)

Answer: f(x)=2x^2+x+4

Now, find the value of f(3)

Answer 1

To find f(3), we substitute x=3 into the equation f(x)=2x^2+x+4:

f(3) = 2(3)^2 + 3 + 4
f(3) = 2(9) + 3 + 4
f(3) = 18 + 3 + 4
f(3) = 25

Therefore, f(3) = 25.