Bprove that a is irrational2÷root 7 – InterviewSolution

1.

Bprove that a is irrational2÷root 7

Answer»

Let us assume that 2 /root7 is rational NUMBER.

72/root7x root7/root7

2

×

7

=

7

2

7

is rational number .

which is only possible is

7

2

7

is rational and √7 is rational.

But the fact is

7

is an irrational.

which CONTRADICTS to our assumption.

$

7

2

is an irrational number. HENCE proved.

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