3.verify that -(-x)=x for
(i)x=\(\frac{11}{15}\)

(ii)x=\(\frac{-13}{17}\)

(i) We have x=\(\frac{11}5\)

∴ -x=\(\frac{-11}{15}\)

-(-x)=\(-(\frac{-11}{15}) = \frac{11}{15}=x \quad\)[∵ (-)×(-)=(+)]

Hence verified

(ii)We have x=\(\frac{-13}{17}\)

∴ -x=\(-(\frac{-13}{17})=\frac{13}{17}\)[∵ (-)×(-)=(+)]



-(-x)=\(-(\frac{13}{17})=x (Verified)\)