Math, asked by sumeena, 9 months ago

find the sum of first 10 terms 9,17,25​

Answers

Answered by mannumishra479
2

Answer:

81

Step-by-step explanation:

a+(n-1)d

a=9. n=10 d=8

9+(10-1)8

9+(9)8

9+72

81

Answered by Anonymous
1

given a=9

d=8

Sn= 10/2[2×9+9×8]

10/2[18+72]

10/2[90]

5×90=450

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