dai toan 7 kho qua

H

hoang030198

bai tren lam minh lam duoc roi
nhan ca 3 cai a^x=bc ; b^y=ac ; c^z=ab voi nhau
=>(a^x)(b^y)(c^z)=(a^2)(b^2)(c^2)
=>a=b=c=2
cac chu ga qua mai ma cha giai duoc
 
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