Assertion: sequence's number | /r/HasProperty | the first
Facets:
Source sentences:
text: That is, I will subtract the numbers in pairs (the first from the second, the second from the third, and so on), like this: Since these values, the "first differences", are not all the same value, I'll continue subtracting: Advertisement Since these values, the "second differences", are all the same value, then I can stop.