OF A1+under root5 irrational number
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let 1+√5 is a rational number
so it can be expressed in the form of p/q where q≠0
1+√5=p/q
√5=p/q-1
√5=(p-q)/q
here (p-q)/qis a rational number but it is equal to irrational number
but it contradict that it is a rational number
so, it is a irrational number
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