Các câu hỏi tương tự
NM
18 tháng 1 2022 lúc 16:12
a, 1-2+3-4+5-6+....+2021-2022
b, 1-6+2-7+3-8+4-9+.......+35-40
c, -1+2-3+4-5+6-.........-2021+2022
d, 1-4+2-5+3-6+.....+197-200
e, -1-2-3-4-5-....-199-200
Tính nhanh C=1/1*2*3+1/2*3*4+1/3*4*5+........+1/2021*2022*2023
KA
22 tháng 9 2021 lúc 0:28
Bài 1: Tính tổng:
a) S = 1+2+3+….+2021 b) P = 1+3+5+……+2021
c) Q = 2+4+6+.......+ 2020 d) M = 1+4+7+.....+298
*Thực hiện1/ (dfrac{2021}{2020}+dfrac{2020}{2021}) x (dfrac{1}{2}-dfrac{1}{3}-dfrac{1}{6})2/ (dfrac{7}{19}-dfrac{5}{12}):dfrac{-5}{8}-(dfrac{7}{19}-dfrac{29}{12}):dfrac{5}{8}3/ dfrac{-5}{6}xdfrac{7}{24}-dfrac{5}{6}xdfrac{14}{24}-dfrac{5}{6}xdfrac{3}{24}
Đọc tiếp
*Thực hiện
1/ (\(\dfrac{2021}{2020}\)+\(\dfrac{2020}{2021}\)) x (\(\dfrac{1}{2}\)-\(\dfrac{1}{3}\)-\(\dfrac{1}{6}\))
2/ (\(\dfrac{7}{19}\)-\(\dfrac{5}{12}\)):\(\dfrac{-5}{8}\)-(\(\dfrac{7}{19}\)-\(\dfrac{29}{12}\)):\(\dfrac{5}{8}\)
3/ \(\dfrac{-5}{6}\)x\(\dfrac{7}{24}\)-\(\dfrac{5}{6}\)x\(\dfrac{14}{24}\)-\(\dfrac{5}{6}\)x\(\dfrac{3}{24}\)
A=(-1)*(-1)2*(-1)3*(-1)4*(-1)5*........*(-1)98*(-2021)
(2021/2022 + 3/5 + -2021/2022) : 1^2/5
( 1/2021 + 2/2022 + 3/2023 ) * ( 1/2 - 1/3 - 1/6 )
2x - 15 = ( -25)
3/5< x/10<4/5 ( với x thuộc N)
giúp mình với
1 -1/2+ 1/3-1/4 +1/5-1/6+ ...+ 1/2021-1/2022
a)M=-2021-68+2021-17-68
b)B=1-2+3-4+5-6+.....+991-1000
c)C=1-2-3+4+5-6-7+8+.......-998-999+1000