Question

1/2+1/6+1/12+1/20+1/30

2/3+2/15+2/35+2/63+2/99

Answer 1

1/2+1/6+1/12+1/20+1/30=5/6

2/3+2/15+2/35+2/63+2/99=10/11

Answer 2

câu 1: 5/6

câu 2 :10/11

ko biết có đúng ko nhưng k mình nhá!

Answer 3

1/2+1/6+1/12+1/20+1/30=5/6

2/3+2/15+2/35+2/63+2/99=10/11