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Răspuns :

Renatemambouko
a=√169×2⁻² + 102×√2/17²×32=√169×1/2² + 102×√1/17²×16=
=13/2 + 102×1/17×4=13/2 + 102/68=13/2 + 3/2=16/2=8

b=18/187×√289×1331/11=18/187×√289×121=18/187 ×17×11=18/187×187=18

ma=(a+b)/2=(8+18)/2=26/2=13
mg=√a×b=√8×18=√144=12

a≤mg≤ma≤b
8<12<13<18     

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