Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

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

Toán Lớp 7: Tìm x: 1/9 ×3^4×3^x=3^x Tính:6^3+3×6^2+3^3/-13 3^2+2^5×(2/3)^2 2^2×9×1/54×(4/9)^2

Toán Lớp 7: Tìm x: 1/9 ×3^4×3^x=3^x
Tính:6^3+3×6^2+3^3/-13
3^2+2^5×(2/3)^2
2^2×9×1/54×(4/9)^2

Comments ( 1 )

  1. 1/9 · 3^4 · 3^x = 3^x
    1/9 · 81 = 3^x : 3^x
              9 = 1
    Vậy x ko có GT thỏa mãn
    6^3 + 3 · 6^2 + 3^3/-13
    = 216 + 3 · 36 + 27/-13
    = 216 + 108 + 27/-13
    = 324 +27/-13
    = 324 + frac{-26}{13} + frac{-1}{13}
    = 324 + (-2) + frac{-1}{13}
    = 322 + frac{-1}{13}
    = 4186/13 + frac{-1}{13}
    = 4185/13
    3^2 + 2^5 · (2/3)^2
    = 9 + 32 · 2^2/3^2
    = 9 + 32 · 4/9
    = 9 + 128/9
    = 81/9 + 128/9
    = 209/9
    2^2 · 9 · 1/54 · (4/9)^2
    = 4 · 9 · 1/54 · 4^2/9^2
    = 36 · 1/54 · 16/81
    = 2/3 · 16/81
    = 32/243
    CHÚC BẠN HỌC TỐT

Leave a reply

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

About Kim Dung