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CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2003

  • question_answer
    The sum of the coefficients in the expansion of \[{{(1+x-3{{x}^{2}})}^{3148}}\] is :

    A)  8                                            

    B)  7

    C)  1                                            

    D)  -1

    Correct Answer: C

    Solution :

    Here we have \[{{(1+x-3{{x}^{2}})}^{3148}}\] Substituting \[x=1\] then sum of coefficient is given by \[{{(1+1-3)}^{3148}}\Rightarrow {{(-\text{1)}}^{\text{3}148}}\text{=1}\]


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