If PR = RQ, then :...

If PR = RQ, then :

A

`overset(rarr)a +overset(rarr)b=2overset(rarr)c`

B

`overset(rarr)a -overset(rarr)b=overset(rarr )c`

C

`overset(rarr)a -overset(rarr)b=2overset(rarr )c`

D

`overset(rarr)a +overset(rarr)b=overset(rarr)c`

Text Solution

Verified by Experts

The correct Answer is:

a

`barc=bara +barPR` but `barPR =barRQ` (equal in magnitude same in direction)
`rarr barc - bara = barb - barc rarr bara + bar b = 2barc`

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