- #1
xplosiv3s
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Homework Statement
Given that c= 3i + 4j and d= i - 2j
find μ when μc + d is parallel to i +3j
Homework Equations
The Attempt at a Solution
3iμ + 4jμ + i + j
i( 3μ + 1) + (4μ -2) j
since it is parallel to i + 3j therefore 3μ+1=3(4μ-2)
giving μ = 7/9
However μ = -1
Additional information:
Apparently (see bold) I am supposed to multiply the LHS by 3 instead of the RHS but by equating I and J vectors and looking at the parallel line it would seem logical to do it the way I have (or am I being retarded?). I can accept that I have the multiply LHS instead of RHS but I don't understand why!