Math, asked by sudhirthakurkumar6, 1 year ago

If the 5th and 12 th term of an ap are -4&-18 respectively find the sum of first 20 terms of the ap

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Answered by BG14
0
hope this helps. ...
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Answered by adityajarwal2004
0

Answer:

Let's have a look on the solution

Answer is 260

Find value of A and D by making two equations

Solve by formula

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