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If vector a= i +j +2k, and b= 3 i +2j -k, when the value of vector (a +3b).(2a - b) is - (a) 15 (b) 18 (c) -18 (d) -15

+1 vote

asked Dec 7, 2018 in Class 12 by kratos

If vector a= i +j +2k, and b= 3 i +2j -k, when the value of vector (a +3b).(2a - b) is -

(a) 15 (b) 18 (c) -18 (d) -15

vector algebra
product of vectors
cross or vector
bseb model set
class-12

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1 Answer

+1 vote

answered Aug 14, 2020 by kratos

Best answer

correct option (d) -15

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