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10th Class Mathematics Arithmetic Progressions Question Bank Arithmetic Progressions

  • question_answer
    The first term and the common difference of an arithmetic progression are 13 and 5 respectively. Find the sum from the 6th term to the 20th term.

    A)  876                       

    B)         146

    C)  1095                     

    D)         1080

    Correct Answer: C

    Solution :

                    \[\therefore \]                 \[=\alpha \times \frac{1}{\alpha }=1\]                 \[=\frac{6m}{{{m}^{2}}+9}\]


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