A = 4 / 7×31 + 6 / 7×41 +9 / 10 x41 + 7 / 10 x57 B = 7 / 19 x 31 + 5 / 19 x 43 + 3 / 23 x43 + 11 / 23 x 57

0 bình luận về “A = 4 / 7×31 + 6 / 7×41 +9 / 10 x41 + 7 / 10 x57 B = 7 / 19 x 31 + 5 / 19 x 43 + 3 / 23 x43 + 11 / 23 x 57”

1. Đáp án:

    

   Giải thích các bước giải:A=124/7+6/7*41+9/10*41+7/10*57

   =124/7+6/7*41+9/10*41+7/10*57,

   =124/7+246/7+9/10*41+7/10*57,

   =124/7+246/7+369/10+7/10*57,

   =124/7+246/7+369/10+399/10

   =4538/35

   b=7217/19+5/19*43+3/23*43+11/23*57

   =217/19+215/19+3/23*43+11/23*57

   =217/19+215/19+129/23+11/23*57

   =217/19+215/19+129/23+627/23

   =24300/437

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