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

Toán Lớp 5: D= 1/3 x 3/5 x 5/7 x 7/9 x…x99/101

Toán Lớp 5: D= 1/3 x 3/5 x 5/7 x 7/9 x…x99/101

Comments ( 2 )

  1. Answer
    D = 1/3 xx 3/5 xx 5/7 xx … xx 99/101
    D = {1 xx 3 xx 5 xx … xx 99}/{3 xx 5 xx 7 xx … xx 101}
    D = {1xx\cancel{3 xx 5 xx … xx 99}}/{\cancel{3 xx 5 xx … xx 99}xx101}
    D = 1/101
    $\text{Vậy}$ D = 1/101
     

  2. D = 1/3 xx 3/5 xx 5/7 xx 7/9 xx … xx 99/101
    D = {1 xx 3 xx 5 xx 7 xx … xx 99}/{3 xx 5 xx 7 xx 9 xx … xx 101}
    D = 1/101
    Vậy D = 1/101
    #dtkc

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