Question

Se considera numerele x, y apartine R, astfel incat x-y. Aratati ca: a) x√2-1 = y√2-1 b) x/2+3 = y/2+3.

Answer 1

astfel incat x-y. Aratati ca:

a) x√2-1 = y√2-1

√2(x-y)=1+1

x-y=2/√2=2√2/√2×√2=√2

x-y=√2

b) x/2+3 = y/2+3

(x-y)×1/2=0

x-y=0