\(\dfrac{56}{15}>\dfrac{-56}{15}\)
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8 tháng 2 2022 lúc 9:29
Tính nhanhA dfrac{1}{2} + ^{dfrac{1}{3}} + dfrac{1}{6} + dfrac{1}{12} + dfrac{1}{15} + dfrac{1}{20} + dfrac{1}{25} + dfrac{1}{30} + dfrac{1}{35} + dfrac{1}{42} + dfrac{1}{56} + dfrac{1}{63}Mình đang cần gấp , mong mn giúp mình với ạ
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Tính nhanh
A = \(\dfrac{1}{2}\) + \(^{\dfrac{1}{3}}\) + \(\dfrac{1}{6}\) + \(\dfrac{1}{12}\) + \(\dfrac{1}{15}\) + \(\dfrac{1}{20}\) + \(\dfrac{1}{25}\) + \(\dfrac{1}{30}\) + \(\dfrac{1}{35}\) + \(\dfrac{1}{42}\) + \(\dfrac{1}{56}\) + \(\dfrac{1}{63}\)
Mình đang cần gấp , mong mn giúp mình với ạ
Bài 5: Tính nhanh tổng sau(nếu có):Mdfrac{3}{2}-dfrac{5}{6}+dfrac{7}{12}-dfrac{9}{20}+dfrac{11}{30}-dfrac{13}{42}+dfrac{15}{56}-dfrac{17}{72} ; Adfrac{5}{1.3}+dfrac{5}{3.5}+dfrac{5}{5.7}+.....+dfrac{5}{2019.2021}
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Bài 5: Tính nhanh tổng sau(nếu có):
M=\(\dfrac{3}{2}\)-\(\dfrac{5}{6}\)+\(\dfrac{7}{12}\)-\(\dfrac{9}{20}\)+\(\dfrac{11}{30}\)-\(\dfrac{13}{42}\)+\(\dfrac{15}{56}\)-\(\dfrac{17}{72}\) ; A=\(\dfrac{5}{1.3}\)+\(\dfrac{5}{3.5}\)+\(\dfrac{5}{5.7}\)+.....+\(\dfrac{5}{2019.2021}\)
Tìm x:a) dfrac{-3}{7}.xdfrac{3}{56}.dfrac{28}{9}b) x-dfrac{3}{16}dfrac{7}{15}:dfrac{3}{5}c) dfrac{2}{5}+dfrac{1}{5}.xdfrac{5}{6}d) dfrac{3}{4}x-dfrac{2}{5}xdfrac{3}{7}.dfrac{1}{6}+dfrac{5}{7}.dfrac{1}{6}*Lưu ý: Trình bày chi tiết kết quả.
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Tìm x:
a) \(\dfrac{-3}{7}\).x=\(\dfrac{3}{56}\).\(\dfrac{28}{9}\)
b) x-\(\dfrac{3}{16}\)=\(\dfrac{7}{15}\):\(\dfrac{3}{5}\)
c) \(\dfrac{2}{5}\)+\(\dfrac{1}{5}\).x=\(\dfrac{5}{6}\)
d) \(\dfrac{3}{4}\)x-\(\dfrac{2}{5}\)x=\(\dfrac{3}{7}\).\(\dfrac{1}{6}\)+\(\dfrac{5}{7}\).\(\dfrac{1}{6}\)
*Lưu ý: Trình bày chi tiết kết quả.
\(\dfrac{1}{2}\)+\(\dfrac{5}{6}\)+\(\dfrac{11}{12}\)+\(\dfrac{19}{20}\)+\(\dfrac{29}{30}\)+\(\dfrac{41}{42}\)+\(\dfrac{55}{56}\)+\(\dfrac{55}{56}\)+\(\dfrac{71}{72}\)+\(\dfrac{89}{90}\)
C= \(\dfrac{10}{56}+\dfrac{10}{140}+\dfrac{10}{260}+...+\dfrac{10}{1400}\)
16 tháng 4 2023 lúc 11:27
tính tổng M=\(\dfrac{10}{56}+\dfrac{10}{140}+\dfrac{10}{260}+....+\dfrac{260}{1400}\)
26 tháng 4 2023 lúc 21:10
\(\dfrac{-3}{7}\) x = \(\dfrac{3}{56}\).\(\dfrac{28}{9}\) Tìm x
13 tháng 4 2022 lúc 10:53
\(\dfrac{1}{30}+\dfrac{1}{42}+\dfrac{1}{56}+\dfrac{1}{72}+\dfrac{1}{90}+\dfrac{1}{110}+\dfrac{1}{132}\)
Tính nhanh:
\(\dfrac{1}{2}\)+\(\dfrac{5}{6}\)+\(\dfrac{11}{12}\)+\(\dfrac{29}{30}\)+\(\dfrac{41}{42}\)+\(\dfrac{55}{56}\)