Question

B
prove that a is irrational
2÷root 7​

Answer 1

Let us assume that 2 /root7 is rational number.

72/root7x root7/root7

2

×

7

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.