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7×2la puterea n-3×2la puterea n=64

Răspuns :

7·2ⁿ-3·2ⁿ=64
2ⁿ·(7-3)=64
2ⁿ·4=64
2ⁿ·2²=2⁶
2ⁿ⁺²=2⁶
n+2=6
n=4