Toán Lớp 6: 4 mũ x cộng 4 mũ x cộng 3 bằng 4160
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Toán Lớp 6: 4 mũ x cộng 4 mũ x cộng 3 bằng 4160
Comments ( 2 )
=>4^x . 1+4^x . 4^3=4160
=>4^x . 1+4^x . 64=4160
=>4^x . (1+64)=4160
=>4^x . 65=4160
=>4^x = 4160:65
=>4^x = 64
=>4^x = 4^3
=>x=3
Vậy x=3