Toán M= 3/(2.5 )+ 3/(5.8) +3/(8.11) + 3/(11.14) + 3/(14.13) 27/11/2021 By Adalynn M= 3/(2.5 )+ 3/(5.8) +3/(8.11) + 3/(11.14) + 3/(14.13)
`M = 3/2.5 + 3/5.8 + 3/8.11 + 3/11.14 + 1/14.13` `M = 1/2 – 1/5 + 1/5-1/8 + 1/8 – 1/11 + 1/11 – 1/14 + 1/14 – 1/13` `M =1/2 – 1/13` `M= 13/26 – 2/26` `M = 11/26` Trả lời
Đáp án: Giải thích các bước giải: $M=\dfrac{3}{2.5}+\dfrac{3}{5.8}+\dfrac{3}{8.11}+\dfrac{3}{11.14}+\dfrac{3}{14.13}$ $ $ $M=\dfrac{1}{2}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{8}+\dfrac{1}{8}-\dfrac{1}{11}+\dfrac{1}{11}-\dfrac{1}{14}+\dfrac{1}{14}-\dfrac{1}{13}$ $ $ $M=\dfrac{1}{2}-\dfrac{1}{13}$ $ $ $M=\dfrac{13}{26}-\dfrac{2}{26}$ $ $ $M=\dfrac{11}{26}$ Trả lời
`M = 3/2.5 + 3/5.8 + 3/8.11 + 3/11.14 + 1/14.13`
`M = 1/2 – 1/5 + 1/5-1/8 + 1/8 – 1/11 + 1/11 – 1/14 + 1/14 – 1/13`
`M =1/2 – 1/13`
`M= 13/26 – 2/26`
`M = 11/26`
Đáp án:
Giải thích các bước giải:
$M=\dfrac{3}{2.5}+\dfrac{3}{5.8}+\dfrac{3}{8.11}+\dfrac{3}{11.14}+\dfrac{3}{14.13}$
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$M=\dfrac{1}{2}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{8}+\dfrac{1}{8}-\dfrac{1}{11}+\dfrac{1}{11}-\dfrac{1}{14}+\dfrac{1}{14}-\dfrac{1}{13}$
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$M=\dfrac{1}{2}-\dfrac{1}{13}$
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$M=\dfrac{13}{26}-\dfrac{2}{26}$
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$M=\dfrac{11}{26}$