Question

prove if x 2 is divisible by 4 then x is even number

Answer 1

\(x^2\) ??

Answer 2

yes

Answer 3

if x^2 is divisible by 4 then x is an even number?

Answer 4

You are given that \(x^2\) is divisible by \(4\), so you can write it as: \(4x^2\)..
And : \(4x^2 = (2x)^2\)

So, choose any \(x\), multiplying it by \(2\) will always give you an Even Number.. :)

Answer 5

how do I prove it by using contrapositive property?

Answer 6

Oh dear..! Now what is this?? :P

Answer 7

perl can you help here??

Answer 8

if x^2 is divisible by 4, then x^2 is divisible by 2. but if x^2 is divisible by 2 , then x is divisible by 2