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30/10/2021 11:16 am
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Verify that -(-x) = x for
(i) x = \(\frac{11}{5}\)
(ii) x = \(\frac{-13}{17}\)
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30/10/2021 11:34 am
(i) We have x = \(\frac{11}{15}\)
∴ -x = \(\frac{-11}{15}\)
-(-x) = -\((\frac{-11}{15})\)
= \(\frac{11}{15}\) = x (verified)
[∵ (-) x (-) = (+)]
(ii) We have x = -\(\frac{13}{17}\)
∴ -x = \(\frac{-13}{17}\) = \(\frac{13}{17}\)
[∵ (-) x (-) = (+)]
-(-x) = \(\frac{-13}{17}\) = x (verified)