Question

COROANA!!!!!!bdndjwjdjrieken....​

Answer 1

Răspuns:

Ana x=√2+√3    y=√2-√3

x-y=√2+√3-(√2-√3)=

√2+√3-√2+√3=2√3∉Q

Maria x=3√2  y= -√18=-√9*2=-3√2

x+y=3√2-3√2=0∈Q

Ioana   x= √2+1/√8=√2+1/√4*2=√2+1/2√2

y=√2

xy=(√2+1/2√2)·√2=√2²+1/2=2+1/2=5/2∈Q

Sabina

x=2√6    y=5√3

x:y=2√6:5√3=2√2·3:5√3=0,4√2∉Q

AAu obtinut numere rationale Maria si Ioana

 Explicație pas cu pas: