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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 20

  • question_answer
    If \[\underset{x\to 0}{\mathop{\lim }}\,\,\frac{x(1+a\,\cos \,x)-b\sin x}{{{x}^{3}}}=1.\]Then value of \[|a+b|\] is

    Answer:

    4


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