Question

 So

 2/15 - 2/35 - 2/63 - 2/99 - ...

Answer 1

2/15 - 2/35 - 2/63 - 2/99 = 4 / 165

k minh di

Answer 2

2/15- 2/35 -2/63- 2/99 

= 2/3x5 - 2/5x7- 2/7x9 - 2/9x11

=(1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11)

=1/3-1/11=8/33

k nha

Answer 3

\(\frac{2}{15}-\frac{2}{35}-\frac{2}{63}-\frac{2}{99}=\frac{4}{165}\)

k mk nha !