Prove that. 7root5is an irrational
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let us assume that 7root5 is rational number
7root5=a/b (a and b are integers,b is not=to0
7b/a=root5 equation 1
7b/a is a rational number
from equation 1,it follows that root 5 is also rational number
but it contredect that root 5 is rational number
our assumption is wrong
7root5 is irrational number
7root5=a/b (a and b are integers,b is not=to0
7b/a=root5 equation 1
7b/a is a rational number
from equation 1,it follows that root 5 is also rational number
but it contredect that root 5 is rational number
our assumption is wrong
7root5 is irrational number
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