Math, asked by abhinash72, 6 months ago

the sum of the First 20 terms of an ap is 400 and that of 40 terms is 1600.find the sum of the first 10 terms and that of n terms

Answers

Answered by Pavana2008

3

Answer:

100 terms

Step-by-step explanation:

20² =400

40² =1600

10² =100

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