A problem by tarun mali

Level pending

Find the minimum number above which the following equation become true X^2>x+1 (correct to 2 decimal places ). Do not owe try and error method.

1.22 1.32 1.53 1.62

Tarun Mali by tarun mali , 21, India

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2 solutions

Santanu Banerjee
Jan 11, 2015

Answer = The golden ratio ~= 1.62

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Given that x 2 = x + 1 x^{2} = x + 1 gives us a positive value of x = 1.6180 x = 1.6180 , the answer must be 1.62 \boxed{1.62}

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I have done it using factorisation

tarun mali - 6 years, 5 months ago

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