Question

show that (gr o gr^-1) (x) = x for all x ∈ D gr

gr = x^2+5x-6
gr^-1- (x+12.25)^0.5 -2.5

Answer 1

gr(x)=x^2+5X-6 ,gr^-1(x)=-5/2 +sqrt(x+1/4)
gr(-5/2+sqrt(x+1/4)=(-5/2+sqrt(x+1/4))^2+5(-5/2+sqrt(x+1/4)-6

Answer 2

\[(\sqrt{x+12.25}-2.5)^2+5(\sqrt{x+12.25}-2.5)-6\rightarrow \]

Answer 3

\[(\sqrt{x+12.25})^2-2*2.5(\sqrt{x+12.25})+2.5^2+5(\sqrt{x+12.25})-2.5*5-6\]

Answer 4

knock were did you get ( squrt x+12.25 -2.5 ? the squart?

Answer 5

\[x+12.25+2.5^2-2.5*5-6=x\]

Answer 6

knock were did you get the squart

Answer 7

got it thanks

Answer 8

\[\sqrt{x+12.25}=(x+12.25)^\frac{ 1 }{ 2 }\]

Answer 9

(: