### Number of terms in a GP whose sum, first and last terms given - Class XI Maths CBSE

Click this link for more videos on Maths for Class XI http://www.iedubook.com/subject/cbse-mathematics-isce-maths-6~.Solve the two equation formed by Sum details given. Then, equate the residual value in Theorem for Sum of a GP to get Common Ratio. After this, find value of First term

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