tính tỉ số A/B A=4/7.31+6/7.41+9/10.41+7/10.57 B=7/19.31+5/19.43+3/23.43+11/23.57

0 bình luận về “tính tỉ số A/B A=4/7.31+6/7.41+9/10.41+7/10.57 B=7/19.31+5/19.43+3/23.43+11/23.57”

1. A5=435.31+635.41+950.41+750.57=35−3135.31+41−3535.41+50−4150.41+57−5050.57A5=435.31+635.41+950.41+750.57=35−3135.31+41−3535.41+50−4150.41+57−5050.57

   A5=131−135+135−141+141−150+150−157=131−157A5=131−135+135−141+141−150+150−157=131−157=> A = 5. (131−157)(131−157)

   B2=738.31+538.43+343.46+1146.57=38−3131.38+43−3838.43+46−4343.46+57−4646.57B2=738.31+538.43+343.46+1146.57=38−3131.38+43−3838.43+46−4343.46+57−4646.57

   B2=131−138+138−143+143−146+146−157=131−157B2=131−138+138−143+143−146+146−157=131−157=> B = 2.(131−157)(131−157)

   A/B = 5/2

   Trả lời

2. A= 4/7.31+6/7.41+9/10.41+7/10.57

   =20/35.31+30/35.41+45/50.41+35/50.57

   =5.(4/35.31+6/35.41+9/50.41+7/50.57)

   =5(1/31−1/35+1/35−1/41+1/41−1/50+1/50−1/57)

   =5(1/31−1/57)

   B=7/19.31+5/19.43+3/23.43+11/23.57

   =14/34.31+10/38.43+6/46.43+22/46.57

   =2.(7/34.31+5/38.43+3/46.43+11/46.57)

   =2.(1/31−1/34+1/34−1/43+1/43−1/46+1/46−1/57)

   =2.(1/31−1/57)

   A/B=[5.(1/31-1/57)] / [2.(1/31-1/57)]

   A/B=5/2

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