don't know why is it wrong here

Given: the points A and B have position vectors i+2j-2k and 2i-j+k respectively. The line l has equation r=i-j+3k+μ(2i-3j+4k)

the correct μ should be -1

pls help thx

Given: the points A and B have position vectors i+2j-2k and 2i-j+k respectively. The line l has equation r=i-j+3k+μ(2i-3j+4k)

the correct μ should be -1

pls help thx