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The two vectors j + k …

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The two vectors j + k and 3i – j + 4k represent the two sides AB and AC, respectively of a triangle ABC. Find the length of the median through A.

    • Posted by Vishal Aggarwal 6 years, 7 months ago

    CBSE > Class 12 > Mathematics
    • 1 answers

    Isshita Modi 6 years, 7 months ago

    AB = j+k Ac = 3i- j + 4k AB+BC=AC BC=AC-AB BC= 3i-2j+3k BD=1/2 BC BD=3/2i-j+k Again law of triangle AD= AB+BD j+k+3/2i-j-3/2k = 3/2i+5/2k

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