If limx→∞ x+cx−cx=4, then the value of c is

If limxx+cxcx=4, then the value of c is

  1. A

    log102

  2. B

    logc2

  3. C

    2

  4. D

    none of these

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    Solution:

    We have,

    limxx+cxcx=4limx1+2cxcx=4=elimx2cxxc=4e2c=4ec=2c=loge2

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