Toán Lớp 6: 2 mũ -1 nhân 2 mũ n cộng bốn nhân 2 mũ n = 9. 2 mũ 5
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Toán Lớp 6: 2 mũ -1 nhân 2 mũ n cộng bốn nhân 2 mũ n = 9. 2 mũ 5
Comments ( 2 )
=>1/2 . 2^n+4.2^n=9.32
=>2^n .(1/2+4)=288
=>2^n . (1/2+8/2)=288
=>2^n . 9/2=288
=>2^n = 288:9/2
=>2^n = 288 . 2/9
=>2^n=64
=>2^n=2^6
=>n=6
Vậy n=6