Question

fie f(x)=2x-4 A=(5,a) apartine Gf si B=(b,5) apartine Gf
determinati a si b

Answer 1

Răspuns:

Explicație pas cu pas:

f(x)=2x-4

A (5 , a) ∈ Gf ; B (b , 5) ∈ Gf

A (5 , a) ∈ Gf <=> f(5) = a =>

f(5) = 2·5-4 = 10-4 = 6 = a =>

a = 6  => A(5 ; 6)

B (b , 5) ∈ Gf <=> f(b) = 5 =>

2b-4 = 5 => 2b = 5+4 => 2b = 9 =>

b = 9/2 => B (9/2 ; 5)