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Find the value of k for which the given ...

Find the value of k for which the given value is a solution of the given equation `7x^2+kx-3=0` at `x=2/3`

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Knowledge Check

  • The general solution of the equation 7cos^2x+sinxcosx-3=0 is given by

    A
    `n pi+pi/2, n in I`
    B
    `n pi-pi/4, n in I`
    C
    `n pi+tan^-1(4/3), n in I`
    D
    `n pi+(3pi)/4, k pi+tan^-1(4/3),n, k in I`

  • For what value of k, (3)/(5) is a root of the quadratic equation 4x^(2)+kx-3=0 ?

    A
    `2(2)/(3)`
    B
    `3(3)/(5)`
    C
    `1(3)/(5)`
    D
    `3(2)/(5)`

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