Question

Answer 1

\(=\dfrac{-1}{5}-\dfrac{13}{15}+\dfrac{5}{7}-\dfrac{5}{7}-\dfrac{7}{9}+\dfrac{7}{9}+\dfrac{9}{11}-\dfrac{9}{11}-\dfrac{11}{13}+\dfrac{11}{13}\)

=-14/15

Answer 2

`(-1)/5 + 5/7 - 7/9+9/11-11/13-13/15+11/13-9/11+7/9-5/7`

`=-1/5+ 5/7 - 7/9+9/11-11/13-13/15+11/13-9/11+7/9-5/7`

`=(5/7-5/7)+(-7/9+7/9)+(9/11-9/11)+(-11/13+11/13)-1/5-13/15`

`=0+0+0+0-1/5-13/15`

`=-1/5-13/15`

`=-3/15-13/15`

`=-16/15`

Answer 3

\(=-\dfrac{14}{15}\)