Question

ajutor va rog....dau coroana....am nevoie repede!​

Answer 1

Răspuns:

Explicație pas cu pas:

4)

a) 2√3-2·3√3+5√3+4√3+2·5√3=6√3-6√3+5√3+10√3=15√3

b) 5-√3-3√2+2√3-5+3√2+4√3=5√3

media geometrica =√a×b=√(15√3·5∛3)=√15·3·5=√225=15

5)

X=√3(√3·√2-/3√2+25/2·5√3)-(12/5√3-√3/2)÷1/3√3-(4√3/5+2√3)·1/√3=

=√3(1/√3+5/2√3)-((24-5·3)/10√3)÷1/3√3-((4√3+10√3)/5)·1/√3=

=√3·(2+5)/2√3-(9/10√3)·3√3-14/5=7/2-27/10-14/5  (aducem la acelasi numitor)⇒(35-28-27)÷10= -2∈Z