Question
The sum of the third and seventh term of an A.P. is and their product is . Find the sum of first sixteen terms of the A.P.
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Text solutionVerified
Let be the common difference of the A.P.
We have,
and
and
We have,
and
and
and
and
and [Putting in the second equation]
Case When
Putting in , we get
Case\ II When
Putting in , we get
Putting in , we get
Case
Putting in , we get
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Question 2
The sum of the first four terms of an AP is 56. The sum of the last four terms is 112. If its first term is 11, then find the number of terms.Stuck on the question or explanation?
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Question Text | The sum of the third and seventh term of an A.P. is and their product is . Find the sum of first sixteen terms of the A.P. |
Answer Type | Text solution:1 |
Upvotes | 150 |