A=-6/7+6/13-6/29 / 9/7-9/13+9/29 B= 2/15 – 2/21 +2/39 / 0.25-5/28+5/52

0 bình luận về “A=-6/7+6/13-6/29 / 9/7-9/13+9/29 B= 2/15 – 2/21 +2/39 / 0.25-5/28+5/52”

1. Đáp án:

   Giải thích các bước giải:

   A=-6/7+6/13-6/29 / 9/7-9/13+9/29

   hayA=-6/7+6/13-6/29 : 9/7-9/13+9/29

   A=-6/7+6/13-6/29         :     9/7-9/13+9/29

   A=-36/91-6/29              :54/91+9/29

   A=-1590/2639                :2385/2639

   A=-2/3

   Trả lời

2. Đáp án:

    

   Giải thích các bước giải:

    A = (-6/7 +6/13 -6/29)/( 9/7-9/13+9/29)

   A = [6.(-1/7 +1/13 -1/29)]/[-9.(-1/7 + 1/13 -1/29)]

   A =6/(-9) =-2/3

   B = (2/15 – 2/21 +2/39)/(0.25-5/28+5/52)

   B = [2.(1/15 – 1/21 + 1/39)] / [5.(1/20 -1/28 +1/52)]

   B = [2.(4/60 – 4/84 + 4/156)] / [5.(3/60 -3/84 +3/156)]

   B = [8.(1/60 – 1/84 + 1/156)] / [15.(1/60 -1/84 +1/156)]

   B = 8/15

   Trả lời