please solve it
prove that 7√5 is irrational
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Step 1 : Prove that √5 is an irrational number
Step 2 : Clearly 7 is rational number
Step 3 : As we know that the product of a rational and an irrational number is always irrational so, 7√5 is irrational (Proved).
But still this is very short way of proving it.!!!!!
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2
7√5is rational
Step-by-step explanation:
7√5=a/b
=√5=a/7b
=since a and b are integer ,so a/7b is rational
=√5isalso rational
=this assumption is incorrect so,
7√5is irrational
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