Show that any positive odd integer is of the form `4q+1` or `4q+3`, where q is some integer.

Explanation

Let we have any positive integer in the form of `4q+1 or 4q+3`

As per Euclid’s Division lemma

If a and b are two positive integers then,

` a = bq+r`

where, `0<=r
let` b=4`

`:. a= 4q+r`

where, ` 0<=r <4`

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