1.

Which of the following expressions have no meaning ?

Answer»

`(HATI .hatj)XX hatj`
`(1)/((hati xx HATK )xx hatj)`
`(1)/((hati xx hatk ) . hatj)`
`(1)/((hatj xx hatk ) . hatj)`

Solution :Divisionoperation not vaildin case of VECTORS. Whendenomiator becomeszerothe QUANTITY is notdefined .


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