Sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112.its first term is 11. then find the number of terms.
Pls give step by step solution bcoz i know the anwer but unable to solve this
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Sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112.its first term is 11. then find the number of terms.
Pls give step by step solution bcoz i know the anwer but unable to solve this
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