well, the sequence goes, 1100, to 1135, to 1170.... notice, is simply adding 35 to get the next term, so the common difference is 35, and the first term is 1100 of course.
How many 10 digit telephone numbers are possible if the first digit cannot be zero?
1 answer:
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Answer:
a) a
b) ab
e) bbbbb
Step-by-step explanation:
We are given the following in the question:
a) a
It is given that
b) ab
Thus, ab belongs to S.
c) aba
This does not belong to S because we cannot find x for which xb belongs to S.
d) aaab
This does not belong to S because we cannot find x for which xb belongs to S.
e) bbbbb
Thus, bbbbb belongs to S.