Question

let f(x)= 5/x and g(x)=2x^2+5x what two numbers are not in domain of the f o g?
A)0,-5/2
B)0,-2/5
c)0,2/5
D)0,5/2
someone help me its a test please!!!!!!!!!!!!!!!!!!

Answer 1

can someone please help >.<

Answer 2

Please note that you can not divide by zero

Answer 3

Please note that your function (fog)(x) is:
\[(fog)(x)=f(g(x))=\frac{ 5 }{ g(x) }=\frac{ 5 }{ 2x ^{2}+5x }=\frac{ 5 }{ x(2x+5) }\]
note that you can not divide by zero, so?

Answer 4

@cx_cassie_

Answer 5

Thank you