1/1x3 + 1/3x5 + 1/5x7 + ...............................+ 1/97x99
=1-1/3 + 1/3 - 1/5 + 1/5 - 1/7 +.............................+ 1/97-1/99
=1-1/99
=98/99
1/1x3 + 1/3x5 + 1/5x7 + ...............................+ 1/97x99
=1-1/3 + 1/3 - 1/5 + 1/5 - 1/7 +.............................+ 1/97-1/99
=1-1/99
=98/99
tính
\(B=\dfrac{1}{1.3}+\dfrac{1}{3.5}+\dfrac{1}{5.7}+...+\dfrac{1}{97.99}\)
tính giá trị biểu thức sau:A=1/1.3+1/3.5+1/5.7+1/7.9+...+1/97.99
Tính giá trị biểu thức sau: A= 1/1.3+1/3.5+1/5.7+1/7.9+...+1/97.99
Tìm x
1/x-1/9999=1/1.3+1/3.5+1/5.7+...+1/97.99
Tìm x
5/1.2+5/2.3+...+5/99.100 - 2x=1/1.3+1/3.5+1/5.7+...1/97.99
Tính tổng:
A=1/1.3 +1/3.5 +1/5.7 +...+ 1/95.97 +1/97.99
please help me
\(\frac{1}{1.3}+\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{97.99}\)
Tính GTBT:
\(A=\frac{1}{1.3}+\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{97.99}\)
Tính:\(\frac{1}{1.3}+\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{97.99}\)