Các câu hỏi tương tự
Tính nhanh :
B = \(\frac{3}{2.5}+\frac{3}{5.8}+\frac{3}{8.11}+\frac{3}{11.14}\)
Cho Mk bt vs !!!
a) 2/3x + 1/4 = 7/12
b) 1/5.8 + 1/8.11 + 1/11.14 + ... + 1/x(x+3) = 101/1540
Tìm x biết:
a) dfrac{1}{5.8}+dfrac{1}{8.11}+dfrac{1}{11.14}+...+dfrac{1}{x.left(x+3right)}dfrac{101}{1540}
b) dfrac{1}{3}+dfrac{1}{6}+dfrac{1}{10}+...+dfrac{2}{x.left(x+1right)}dfrac{99}{101}
Đọc tiếp
Tìm x biết:
a) \(\dfrac{1}{5.8}+\)\(\dfrac{1}{8.11}+\)\(\dfrac{1}{11.14}+\)...\(+\dfrac{1}{x.\left(x+3\right)}\)\(=\dfrac{101}{1540}\)
b) \(\dfrac{1}{3}+\)\(\dfrac{1}{6}+\)\(\dfrac{1}{10}+\)...\(+\dfrac{2}{x.\left(x+1\right)}\)\(=\dfrac{99}{101}\)
(3/2.5 3/5.8 ... 3/17.20).x=45/23
Tính \(S=\frac{1}{2.5}+\frac{1}{5.8}+\frac{1}{8.11}+...+\frac{1}{101.104}\)
\(\frac{1}{2.5}+\frac{1}{5.8}+\frac{1}{8.11}............+\frac{1}{2015.2018}\)
1 + 1 + 1 +..................+ 1 = 2
5.8 8.11 11.14 x . ( x + 1 ) 3
Giups mk nha mk cần trong hôm nay ai nhanh mk tick cố gắng làm giúp mk
6. tính thuận tiện d) 5,8 + 5.8 x 3 + 5.8 x 5 + 5.8
5.8 m2 + 5.8 m2 *3 + 5.8m2
chuyen thanh phep nhan nhe!