Question

Let f(x) =the square root of x, g(x) = x + 8 and h(x) = 9x.
Find the domain of the following function then simplify the expression. (g − h)(x)

Answer 1

(g-h)(x) = x+8-9x=8-8x=8(1-x) the domain is all real numbers

Answer 2

oh wait sorry h=9/x !!

Answer 3

ok similarly (g-h)(x) = x+8 - 9/x and the domain R−{0} (all real numbers except for x=0)

Answer 4

so itd be x-1/x ?

Answer 5

no, x +8 -9/x cannot be simplifed any further

Answer 6

oh ok thank you!