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

Toán Lớp 6: 1. Rút gọn : a.(5 mũ 4 ) mũ 2 : ( – 35/24) mũ 2 b. x mũ 9 : (-x) mũ 4 c. 3 mũ7 x 9 d. 4 mũ 6 x 64

Toán Lớp 6: 1. Rút gọn :
a.(5 mũ 4 ) mũ 2 : ( – 35/24) mũ 2
b. x mũ 9 : (-x) mũ 4
c. 3 mũ7 x 9
d. 4 mũ 6 x 64

Comments ( 2 )

  1. a) (5^4)^2 : (-35/24)^2
    = 625^2 : (-35/24)^2
    = (625 : (-35)/24)^2
    = (625 . (-24)/35)^2
    =(-3000/7)^2
    b) x^9 : (-x)^4
    = x^9 : x^4
    =x^5
    c) 3^7 .9
    = 3^7 . 3^2
    =3^9
    d) 4^6. 64
    = 4^6. 4^3
    = 4^9
     

  2. a ) ( 5^4 )^2 : ( – 35/24 )^2
    = 625^2 : ( – 35/24 )^2
    = ( 625 : – 35/24 )^2
    = (- 3000/7)^2
    b ) x^9 : ( -x )^4
    = x^9 : x^4
    = x^5
    c ) 3^7 × 9
    = 3^7 × 3^2
    = 3^9
    d ) 4^6 × 64
    = 4^6 × 4^3
    = 4^9
    #dtkc
     

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