Question

If f(x)=2x-1 and g(x)= √x, then the domain of (fog)(x) is

Answer 1

Domain of f(x) is clearly the set of real numbers.
Similarly for g(x), domain would be the set of whole numbers.
Since dom of (fog)(x) is asked, its dom would be the intersection of both f(x) and g(x) i.e. all whole numbers consist its domain.
You can see from its value also, fog(x) = 2(sqrtx - 1)

Answer 2

so how would i solve

Answer 3

Solved already... Check what I posted again for once...
domf(x) = Real numbers
domg(x) = x>= 0
So intersection of domains , domf(x) int domg(x) = x>=0
I preferred that way because no way to input maths symbols...

Answer 4

(0,∞)
(-∞,∞)
[0,∞)
(1,∞)
[1,∞)
is it one of these

Answer 5

It is option 3 , because square braces represent that o is included in the domain...

Answer 6

ok thanks can you help me with another problem

Answer 7

O.k. of course...

Answer 8

ok im about to start a new question