Question

E.N. 2 si 3 va roggg
dau coroana,multumesc

Answer 1

2) =1.5*0.5+1/2=
=15/10*5/10+1/2=
=3/4+1/2=
=3/4+2/4=
5/4=5/4 (adevărat)

3) Fie a și b-nr.
Ma=(a+b)/2=150=>a+b=150*2, a+b=300
a+b=300
a/b=1/2=>b=2a
a+2a=300
3a=300
a=300/3
a=100=>b=200

Answer 2

(1+0,5)(1-0,5)+(1/√2)²=3/4+1/2=3+2/4=5/4
(1+0,5)(1-0,5)=1²-0,5²²=1-0,25=0,75
0,75=75/100=3/4 (simplifici prin 25)

3. (a+b)/2=150-media aritmetica
a/b=1/2=k
a=k
b=2k
k+2k/2=150
3k/2=150
3k=150·2
3k=300
k=300/3
k=100
a=1·100=100
b=2·100=200

V:(100+200)/2=300/2=150

Sper ca te-am ajutat..