Math, asked by Srikarchintu4999, 10 months ago

Find the sum of progression 18, 15, 12, …….. 10 terms

Answers

Answered by nehap0327

1

Answer:

45

Step-by-step explanation:

the progression is in ap

a2-a1=a3-a2=-3

sn=n/2(2a+n-1.d)

s10=10/2(2*18+9*(-3)

s10=5(36-27)

s10=45

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