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7,13,19......,205

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7,13,19......,205
  • 1 answers

Saurabh Pandey 5 years, 10 months ago

a= 7,d=13-7=6 ,n=205 = an=a+(n-1)d = 7+(205-1)6=7+204×6= 7+1224=1231 =an=1231
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