find and simlify each of the following, given f(x)=sqrtx+5 and g(x)=5x+1
question 1 f^-1(x) question 2 (g0f)(-1)
that is the little circle between g and f

Question

find and simlify each of the following, given f(x)=sqrtx+5 and g(x)=5x+1
  question 1 f^-1(x)                 question 2 (g0f)(-1)
                                                                     that is the little circle between g and f

blockcolder · Answer

$$f(x)=\sqrt{x}+5\
y=\sqrt{x}+5\
x=\sqrt{y}+5\
x-5=\sqrt{y}\
y=f^{-1}(x)=(x-5)^2$$

blockcolder · Answer

$$(g \circ f)(-1)=g(f(-1))$$
However, f(-1) is undefined, so g(f(-1)) is also undefined.

anonymous · Answer

dont you put 5x+1 for g and multiply it to sqrt x+5 then all that by -1

anonymous · Answer

so the answer to both is undefined

anonymous · Answer

thank you blockcolder