If a =1/a-15, find (i) a-1/a(ii) a +1/ a(iii) a²-1/a²Hint.a=-->1/a- – InterviewSolution

1.	If a =1/a-15, find (i) a-1/a(ii) a +1/ a(iii) a²-1/a²Hint.a=-->1/a-5= a2-5a-1=0.
Answer» a=1/a-51/a=a-5a-5+5=1/a +5(add 5 to both sides)a=1/a+5a-1/a=5a^2-1/a=5a^2-1=5a(a+b)(a-b)(a+1)(a-1)=5a(a-1)=5a/a+1divide whole equation by aa-1/a=5a^2/a+1 anda+1/a=5a^2/a-1

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