A body is moving under the action of two...

A body is moving under the action of two force `vec(F_(1)=2hati-5hatj` , `vec(F_(2)=3hati-4hatj` . Its velocity will become uniform under a third force `vec(F_(3)` given by.

`5hati-9hatj`

`-5hati-9hatj`

`5hati+9hatj`

`-5hati+9hatj`

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