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11th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-12

  • question_answer
    If \[f:R\to R\] satisfies \[f\left( x\text{+}y \right)=f\left( x \right)+f\left( y \right),\] \[\forall x,\] \[y\in R\] and f(1)= 11, then \[\sum\limits_{r=1}^{n}{f(r)}\] is _______.

    A)  \[\frac{11\,n\,(n+1)}{2}\]          

    B)  \[\frac{11\,n}{2}\]

    C)  \[11{{n}^{2}}\]                                 

    D)  \[\frac{11\,{{n}^{2}}}{2}\]

    E)  None of these

    Correct Answer: A

    Solution :

     Not Available   


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