Math, asked by khushbu1215, 11 months ago

समांतर श्रेणी मे 2,7,12,,,,,,,,के 10 पद सुधी के plus किजिए।​

Answers

Answered by sheljak7
1

Step-by-step explanation:

sn= n/2 [2A+(n-1)×d]

a= 2

d= 5

n=10

sn= 10/2 [2×5+(10-1)×5]

= 5×[10+45]

=5× 55

=275

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