यदि `A=(3hati+4hatj-k),B=(2hati-hatj+hatk)` तो A + B तथा A - B का मान ज्ञात कीजिए।

Explanation

A+B = `(3+2)hati+(4-1)hatj+(-1+1)hatk`
`-5hati+3hatj+0hatk`
A-B = `(3-2)hati+(4+1)hatj+(-1-1)hatk`
`=hati+5hatj-2hatk`