Question

the sum three consicultive is 21 and sum of this term is 165​

Answer 1

Answer:

let the terms are a-d,a,a+d

sum=a-d+a+a+d=3a

3a=21

a=7

second condition

a2+d2-2ad+a2+a2+d2+2ad=165

3a2+2d2=165

49*3+2d2=165

147+2d2=165

2d2=18

d2=9

d=3

so the series is 4,7,10

Step-by-step explanation:

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