Matematika

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1 Jawaban

  • x.¹/y - y.¹/x xy
    = --------------. -----
    ¹/x. - ¹/y. xy

    x²- y²
    = ---------
    y - x

    (x-y)(x+y)
    = --------------
    - (x-y)

    = - (x+y)
    = -x - y


    AD = 2+4
    = 6
    BC = √8²+6²
    = √100
    = 10

    BE = ½ BC
    = 5

    Sin B = ac/bc
    = 8/10
    = 4/5

    Cos B = 3/5

    ed² = bd²+be²-2.bd.eb cos B
    = 4²+5²-2.4.5.3/5
    = 16+25-24
    = 17
    ed = √17


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