Question

2/3.5 + 2/5.7 + 2/7.9 + ... + 2/97.99 = ?

Answer 1

 vipboyss5: \(\frac{32}{99}\)chứ ko phải 33

Answer 2

1/3.5+1/5.7+1/7.9+...+1/97.99

=1/3-1/5+1/5-1/7+1/7-1/9+...+1/97-1/99

=1/3-1/99

=33/99-1/99

=32/99