Question

Show that 2*root7 is irrational

Answer 1

Answer:

Let 2√7 be a rational number which can be expressed in the form of p/q where p and q are integers, relatively prime and q is not equal to zero.

2√7=p/q

p/2q =√7

Since p and 2q are Integers so

p/2q

is a rational number which implies that

√7

is a rational number which is not true.

hence our assumption is wrong .

Therefore

2√7 is an irrational number..

Answer 2

Answer:

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