Question

00

Answer 1

`1+1/3-3/5+5/7-7/9+9/11-11/13-9/11+7/9-5/7 +3/5 - 1/3+1`

`=(1+1)+(1/3-1/3)+(-3/5+3/5)+(5/7-5/7)+(-7/9+7/9) +(9/11-9/11)-11/13`

`=2+0+0+0+0-11/13`

`=2-11/13`

`=26/13-11/13`

`=15/13`

Answer 2

\(=2+\dfrac{1}{3}-\dfrac{1}{3}-\dfrac{3}{5}+\dfrac{3}{5}+\dfrac{5}{7}-\dfrac{5}{7}+\dfrac{-7}{9}+\dfrac{7}{9}+\dfrac{9}{11}-\dfrac{9}{11}-\dfrac{11}{13}\)

=2-11/13=15/13