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

Toán Lớp 7: 2$^{12}$ .3$^{5}$ -4$^{6}$ .3$^{6}$/2$^{12}$ .9$^{3}$ -8$^{4}$.3 $^{5}$

Toán Lớp 7: 2$^{12}$ .3$^{5}$ -4$^{6}$ .3$^{6}$/2$^{12}$ .9$^{3}$ -8$^{4}$.3 $^{5}$

Comments ( 2 )

  1. (2^12 * 3^5 – 4^6 * 3^6)/(2^12 * 9^3 – 8^4 * 3^5)
    = (2^12 * 3^5 – (2^2)^6 * 3^6)/(2^12 * (3^2)^3 – (2^3)^4 * 3^5)
    = (2^12 * 3^5 – 2^12 * 3^6)/(2^12 * 3^6 – 2^12 * 3^5)
    = (2^12 * (3^5 – 3^6))/(2^12 * (3^6 – 3^5))
    = (2^12 * (3^5 * 1 – 3^5 * 3))/(2^12 * (3^5 * 3 – 3^5 * 1))
    = (2^12 * 3^5 * (1 – 3))/(2^12 * 3^5 * (3 – 1))
    = (2^12 * 3^5 * (-2))/(2^12 * 3^5 * 2)
    = (-2)/2
    = -1

  2. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     (2^12 . 3^6 – 4^6 . 3^5)/(2^12 . 9^3 – 8^4 . 3^5 )
    =(2^12 . 3^5 – 2^12 . 3^6)/(2^12 . 3^6 – 2^12 . 3^5)
    =(2^12 . (3^6 – 3^5))/(2^12 . (3^6 – 3^5))
    =1

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