Question

5) Prove that square root of 7 is an irrational number.

Answer 1

Answer:

Step-by-step explanation:

let root7 be rational no.

root7=p/q,where p and q are co-prime

squaring both sides,

7=p2/q2

7q2=p2

7 is divisible by p

and similarily,7 is divisible by q

this contadicts fact that p and q are co prime

so, root7 is irrational

hope it helps....