Which expression is equal to
(f+g)(x)?
f(x)=x^2+3;g(x)=x-1
(f+g)(x) is the same as f(x)+g(x). If f(x)=x^2+3 and g(x)=x-1, you can substitute them out. The expression becomes (x^2+3)+(x-1). Simplify
Which of the following sets of ordered pairs represents a function?
{(5,2),(2,6),(5,10),(1,2)}
{(-3,2),(2,6),(5,2),(1,7)}
{(-3,2,(2,6),(3,10),(1,7)}
{(-3,2),(2,6),(5,10),(2,-1)}
^dont get this one..
Which expression is equal to
(f+g)(x)?
f(x)=x^2+3;g(x)=x-1
x^2+x+2
x^2+-2x+4
x^3-x^2+3x-3
x^3-3<- or b.
f(x)=2x+5;g(x)=3x^2
which expression is equal to
(Fog)(x)?
12x^2+60x+75
6x^2+5 <-- or D
6x^2+56x^2+5
3x^2+2x+5
f(x)=4x-7;g(x)x+3
what is the value of (gof)(4)?
9
14
12
21<--
f(x)=10x-5
what is the value of f^-1(-4)
-35
0.1
0.01
-45 < yeah I really don't get this one neither.
5 answers
f(x)=2x+5;g(x)=3x^2
which expression is equal to
(Fog)(x)?
(Fog)(x) means f(x)*g(x). If f(x)=2x+5 and g(x)=3x^2, then you can substitute them. The expression becomes (2x+5)*(3x^2). Simplify
which expression is equal to
(Fog)(x)?
(Fog)(x) means f(x)*g(x). If f(x)=2x+5 and g(x)=3x^2, then you can substitute them. The expression becomes (2x+5)*(3x^2). Simplify
Thanks! I should've just went with b.
IGNORE THE LAST ONE ON (fog)(x). IT IS WRONG. It should be f(g(x)), where 3x^2 substitutes for x in f(x). It becomes 2(3x^2)+5. If it were g(f(x)), it would be opposite.
Thank you!!