Question

i will mark as brainleist plz solve if x+1/x =2, then x^3+1/x^3=??? hey friend this is 9th standard question

Answer 1

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Here's your answer...

x + 1/x = 2
(x + 1/x)³ = x³ + 1/x³ + 3×x×1/x (x + 1/x)
2³ = x³ + 1/x³ + 3(2)
8 = x³ + 1/x³ + 6
x³ + 1/x³ = 2

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Answer 2

x+1/x =2
has only one real value
proof: (x-1/x)^2=0
x=1/x
x=+1
1+1=2