Math, asked by julfikarhaque, 7 months ago

sum of how many terms of arithmetic progression 15, 10, 5,..... Will be zero ​

Answers

Answered by swapnilsarje17
0

answer15,10,5,...….

a=15

d=10−15=−5

Sn​=2n​[2a+(n−1)d]

S10​=210​[2×15+(10−1)(−5)]

      =5[30−5×9]

       =5[30−45]

       =5(−15)=−75.

Similar questions