given that f(x)=2x+1
find f(2)
x is just a place holder -- you can replace it with whatever you want
so, f(2) = 2*2 + 1 = ____
To find f(2), substitute x=2 into the equation f(x) = 2x+1:
f(2) = 2(2) + 1
Simplifying this expression:
f(2) = 4 + 1
f(2) = 5
Therefore, f(2) is equal to 5.