Math, asked by ayshazoya19, 11 months ago

in an ap if the 12tg term is -13 and its sum of iys 1st forth sums is 24 find rhe sum of iys first 20 sums

Answers

Answered by rkpandeyn
4

Answer:

tn=20, d=a2-a1=24-20=4,

tn=tn={n-1}×d

t20=4

t20=5

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