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    Stuggling with part cii, found vector BP, and then used distance formula to find a quadratic in mu, and found mu to be 5/3 and 1/3 but that is wrong, why do you have to do vector PB thought it did not matter which one you do. Thanks

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    (Original post by Jimmy20002012)
    Stuggling with part cii, found vector BP, and then used distance formula to find a quadratic in mu, and found mu to be 5/3 and 1/3 but that is wrong, why do you have to do vector PB thought it did not matter which one you do. Thanks

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    It doesn't matter which one you do. I got -5/3, -1/3 for mu.
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    (Original post by ghostwalker)
    It doesn't matter which one you do. I got -5/3, -1/3 for mu.
    So I got 5/3 and 1/3, is that wrong? Where have I gone wrong?

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    (Original post by Jimmy20002012)
    So I got 5/3 and 1/3, is that wrong? Where have I gone wrong?

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    In working out the vector BP.

    Consider the first coordinate. It's 6 - (8+2u) = -2 -2u, not 2u-2.

    Similarly the others.
 
 
 
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