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Va rog mult,in limita puterilor ajutatima!!!
f:R in R,f(x)=x+1 si g:R* in R*,g(x)=2\x
Multumesc anticipat!!!

Răspuns :

Thenuts
f(x) = g(x)
x+1=2/x
=> x + 1 = 2/x
=> 2 = x(x+1)
=> 2= x^2+1
=> x^2+1-2=0
=> x^2-1=0
=> x^2=1
=> x=1
f(x)=y => x+1=y => y=2
g(x)=y => 2/1=y => y=2

=> x = 1 , y=2

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