दो अंको की एक संख्या और उसके पलटने से बनी संख्या का योग है यदि संख्या जोड़ दिया जाए तो नई संख्या का योग की योग की 5 गुनी हो जाती है संख्या ज्ञात करें
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= 2 where 2 is a rational number . Here n is perfect square the is rational number
= 2.236.. is not rational number But it is irrational number.here n is not a perfect square the is irrational number
So is not irrational number if n is perfect square.
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