Question

If x+1/x=5 evaluate
i)x2+1/x2
ii)x4+1/x4
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Answer 1

Answer:

1. x+1 = x*5 ( On cross multiplying )

x+1 = 5x

x-5x = 1

-4 x= 1

-x= 1/4

or -1/4

2. x²+1 /x² ( cancel x² from x²)

+1

3. x⁴+1/x⁴ ( cancel x⁴ from x⁴)

+1

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