Songoku saiyan 4 sai rồi kết quả hai là \(\frac{49}{99}\) |
Songoku saiyan 4 sai rồi kết quả hai là \(\frac{49}{99}\) |
A =\(\frac{1}{1x3}\) +\(\frac{1}{3x5}\) + \(\frac{1}{5x7}\) + ..... +\(\frac{1}{97x99}\)
tinh gia tri bieu thuc:
a) M = \(\frac{1}{1x2}+\frac{1}{2x3}+\frac{1}{3x4}+....+\frac{1}{99x100}\)
b)N = \(\frac{1}{1x3}+\frac{1}{3x5}+\frac{1}{5x7}+...+\frac{1}{97x99}\)
\(x\)la dau nhan
gâp ạ
Tính nhanh giá trị biểu thức sau:
\(\frac{2}{1x3}+\frac{2}{3x5}+\frac{2}{5x7}+.....+\frac{2}{95x97}+\frac{2}{97x99}\)
\(\left(\frac{1}{1x3}+\frac{1}{3x5}+\frac{1}{5x7}+\frac{1}{7x9}+\frac{1}{9x11}\right)\)
Tính
\(\frac{1}{1x3}+\frac{1}{3x5}+\frac{1}{5x7}+\frac{1}{7x9}+\frac{1}{9x11}\)
Tính giá trị biểu thức:\(A=\frac{1}{1x3}+\frac{1}{3x5}+\frac{1}{5x7}+...+\frac{1}{999x1001}\)
\(\frac{1}{1x3}+\frac{1}{3x5}+\frac{1}{5x7}+......+\frac{1}{Xx\left(X+2\right)}=\frac{8}{17}\)
Tìm x, biết x là số lẻ
1/1x3 + 1/3x5 + 1/5x7 + .... + 1/97x99
\(\hept{\begin{cases}\\\end{cases}}\frac{1}{1x3}\)+\(\frac{1}{3x5}\) + \(\frac{1}{5x7}\)+ \(\frac{1}{7x9}\)+ \(\frac{1}{9x11}\)} x Y = \(\frac{2}{3}\)
Tìm Y