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OpenStudy (samigupta8):
the vector joining the points (1,1,-1)and B(2,-3,4) and pointing from A to B
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OpenStudy (anonymous):
We have:co ordinates of A in vector form:i+j-k and B:2i-3j+4k .so a vector AB from A To B wil be A-B. i.e: -i+3j-5k
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