Math, asked by fathi69, 9 months ago

there are 20trrms in an arithmetic sequence. the sum of first and last term is 88. what is the sum of 2nd and 19th terms?​

Answers

Answered by Vamprixussa
57

Given

Total number of terms = 20

Terms are in AP

Sum of first and the last term = 88

\implies a + a + 19d = 88\\\implies 2a+19d = 88 -- (1)

To find

Sum of the second and 19th term

\implies a+d+a+18d=?\\\implies 2a + 19d=?--(2)

Equations (1) and (2) are same

Therefore,

2a + 19d = 88

                                                   

Answered by Itsritu
48

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