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11 questions from this quiz
Series adds terms, sequence lists them
Sum of first nnn terms
The first term
Common difference between terms
Sn=n2[2a+(n−1)d]S_n = \frac{n}{2}[2a + (n-1)d]Sn=2n[2a+(n−1)d]
670670670
Tn=Sn−Sn−1T_n = S_n - S_{n-1}Tn=Sn−Sn−1
333
121212
nnn must be positive
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