1.

If bara,barb,barc are three vector suchthat each is inclined at an angle pi/3 " with the other two and" absbara =1, absbarb =2, absbarc=3, " then the scalar product of the vectors " 2bara+3barb-5barc and 4bara-6barb+10barc is equal to

Answer»

333
334
-333
-334

Answer :D


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