s100=50(2+99)
this is because a=1, d=1 and n=100.
answer is 5050
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The sum of the first 100 natural numbers is 5,001.
50.5
sorry
That infinite list would include all of the natural numbers, minus only the first 100. It begins at 101 and continues infinitely.
The first 100 odd whole numbers are: 13579111315171921232527293133353739414345474951535557596163656769717375777981838587899193959799101103105107109111113115117119121123125127129131133135137139141143145147149151153155157159161163165167169171173175177179181183185187189191193195197199.