Toán tính tổng sau:A=3/11.6+3/16.21+3/21,26+…+3/61.66 09/07/2021 By Hadley tính tổng sau:A=3/11.6+3/16.21+3/21,26+…+3/61.66
A=3/11.16+3/16.21+3/21,26+…+3/61.66 A=3/5.(5/11.16+5/16.21+5/21.26+…+5/61.66) A=3/5.(1/11 – 1/16 + 1/16 – 1/21 + 1/21 – 1/26 + … + 1/61 – 1/66) A=3/5.(1/11-1/66) A=3/5.5/66 A=3/66 Trả lời
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A=3/11.16+3/16.21+3/21,26+…+3/61.66
A=3/5.(5/11.16+5/16.21+5/21.26+…+5/61.66)
A=3/5.(1/11 – 1/16 + 1/16 – 1/21 + 1/21 – 1/26 + … + 1/61 – 1/66)
A=3/5.(1/11-1/66)
A=3/5.5/66
A=3/66