Math, asked by SidhuDhoni437, 1 year ago

Sum of first and 17th terms of arithmetic sequence is 40 sum of its 1st and 18th term is 43 what is common difference and sum of 11th and 7th term

Answers

Answered by Sumarsinsini

2

x+17=40

x+18=43

(18-17) =43-40

1=3

Than

11th=3×11=33

7th=3×7=21

Difference of 11th and 7th

33-21=12

Sum of 11th and 7th

33+21=53

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