Question

When vector A is added to B the resultant is 2i-j+k and when A is subtracted to B the resultant is 2i-3j+3k The Magnitude of B is
A 3√2
B 2√3
C √2
D 8 me

Answer 1

Answer:

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The answer ==>>

ATQ

A`+B`=2i-j+k -------(1)

A`-B`=2i-3j+3k -------(2)

now, Add the equations 1 and 2,

Thus , 2A=4i-4j+4k

and A=2i-2j+2k

Put value of A in eq 1,

Thus,

2i-2j+2k+B=2i-j+k

==>>

B=j-k

Answer 2

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