The sum of first ten terms of an AP is -150 and sum of next ten terms is -550 . Find the AP

The sum of first ten terms of an AP is -150 and sum of next ten terms

1.	The sum of first ten terms of an AP is -150 and sum of next ten terms is -550 . Find the AP
Answer» Let first 10 terms of this AP bea,a+d,a+2d.........a+9dAdd all these terms we get10a+45d=-150 ....... (1)Let next 10 terms bea+10d,a+11d........a+19dAdd them up,10a+145d=-550 ......... (2)Subtracting 1 from 2100d=400d=4Putting d=4 in 1a=-33Then find the APCHEERSGIVE ME MY THANKS