Question

1.
a) Show that root 5 is an irrational number​

Answer 1

Answer:

step1: let √5 is a rational number.

• so, we can write it in the form of (p\q#0) a/b#0. (# i.e not equal to 0)
• √5 =a/b and we find integer and b .let a and b are coprime .
• now √5=a/b
• squareing both sides
• (√5) ×√5= (a/b)(a/b)
• 5=a×a/b×b
• 5b×b=a×a. ( 1) equation