If a2+1/a2=7, findi)a+1/a &ii)a-1/a – InterviewSolution

1.

If a2+1/a2=7, findi)a+1/a &ii)a-1/a

Answer»

Answer:

a+1/a= +- 3,a-1/a= +-(ROOT 5)

Step-by-step EXPLANATION:

i)a+1/a -------> square it we get

a2+1/a2+2=7+2=(a+1/a)2

a+1/a= +-3

same for a-1/a we get

7-2=(a-1/a)2

a-1/a= +-(root 5)

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