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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: `7^x` + `7^x+1` + `7^x+2`= 3 . 19 . 343 Tìm x

Toán Lớp 6: 7^x + 7^x+1 + 7^x+2= 3 . 19 . 343
Tìm x

Comments ( 1 )

  1. 7^x+7^x+1+7^x+2=3.19.343
    7^x+7^x+1+7^x+2=19551
    (7^x.3)+1+2=19551
    (7^x.3)=19551-2-1
    (7^x.3)=19548
    7^x=19548:3
    7^x=6516
    7^x không có 6516
    =>x in ∅

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222-9+11+12:2*14+14 = ? ( )

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