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    Evaluate: 12+13+14+15\frac1{2+\frac1{3+\frac1{4+\frac15}}}2+3+4+51​1​1​1​​
    Question

    Evaluate: 12+13+14+15\frac1{2+\frac1{3+\frac1{4+\frac15}}}

    A.

    157/68

    B.

    68/157

    C.

    5/46

    D.

    21/110

    Correct option is B

    Solution:

    12+13+14+15=12+13+1215=12+16821=115768 =68157\frac{1}{2 + \frac{1}{3 + \frac{1}{4 + \frac{1}{5}}}} \\= \frac{1}{2 + \frac{1}{3 + \frac{1}{\frac{21}{5}}}}\\ = \frac{1}{2 + \frac{1}{\frac{68}{21}}} \\= \frac{1}{\frac{157}{68}} \\\ \\= \frac{68}{157}\\

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