Question

in a ap the 12th term of AP is -13 and the sum of first four term is 24 then find the sum of first 10 term in anAP
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Answer 1

Answer:

Assume an A.P series with ‘a’ as its first term and the difference between the consecutive terms be ‘d’. Our term of the A.P is -13. So, we can write it in mathematical form, i.e, . We have a summation of the first four terms equal to 24. So, we can also write it in mathematical form, i.e, . Now, we have two equations and two unknown variables. Using these two equations, find the values•

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