Math, asked by vinipan, 1 year ago

In an ap , the sum pf n terms is 1/2(5n^2+3n) . Find its 40th term

Answers

Answered by vipin55

1

40th term is 199 at place of 189 sorry
A =4
D =5

Attachments:

vinipan: 40th term is 199
Calculation in last step is wrong

vipin55: ok

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