Adding up the Terms of a Sequence (HSC SSCE Mathematics Advanced): Quizzes

The sum of the first $n$ terms

The $n$th partial sum

$45$

It includes all previous terms plus one new

$T_n = S_n - S_{n-1}$

$10$

$54$

The starting value for $n$

The sequence of partial sums

$2n - 1$