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Question Number 1734 by Rasheed Ahmad last updated on 07/Sep/15

a b e l o n g s t o a n i n t e r v a l A a n d

k \in R^{+} i s a c o n s t a n t . D e t e r m i n e

A i n c a s e

∣ a - k ∣^{∣ a + k ∣} ⩾ ∣ a + k ∣^{∣ a - k ∣}