la 5 va rooog frumooos

Răspuns:
Explicație pas cu pas:
ex.5
a=(1/√5+1/√3)·√30/(√5+√3)=(√5+√3)/√15·√30/(√5+√3)=√2
b=√128=√2^7=8√2
mg²=a·b=√2·8√2=8·2=16 ⇒mg=4
Raspuns corect: Ion