What is a series?

What is the notation for series?

How do you write $n$-th term at A-level?

What sequence does $\sum^{n} _ {r = 1} (3r - 1)$ describe?

What is $\sum^3 _ {r = 1} (2r)$?

What is the name for a summation of a sequence?

$1 + 4 + 7 + 10…$ is a…?

$1, 4, 7, 10…$ is a…?

How can you find the sum of a series that starts at $r = k$?

How can you rewrite $\sum^{n} _ {r=k}$?

What is $\sum^{n} _ {r=1} f(r) - \sum^{k-1} _ {r=1} f(r)$ equivalent to?

How can you rewrite $\sum^{n} _ {r=1} kf(r)$?

What’s an alternate form of $k \times \sum^{n} _ {r=1} f(r)$?

How could you rewrite $\sum^{n} _ {r = 1} (f(r) + g(r))$?

What is $\sum^{n} _ {r=1} k$ the same as?

How could you rewrite $\sum^{25} _ {r=1} (3r + 1)$?

How can you find the sum of a series that starts at $k$, not $1$?

What’s another way of writing $\sum^{n} _ {r=k}$?

How do you deal with something other than $n$ at the top of the $\Sigma$, like $\sum^{4n-1} _ {r=1}$?

What’s the value of $\sum^{2n} _ {r=1} 5$?

If you show $\sum^{4n-1} _ {r=1} (3r+1) = 24n^2 - 2n - 1$, what’s the first step to solving $\sum^{7} _ {r=1} (3r+1)$?

If $\sum^{n} _ {r=1}$ is linear, the expression for $\sum^{n} _ {r=1} r$ is…?

If $\sum^{n} _ {r=1}$ is linear, the expression for $\sum^{n} _ {r=1} r^2$ is…?

If $\sum^{n} _ {r=1}$ is linear, the expression for $\sum^{n} _ {r=1} r^3$ is…?

How could you simplify $\frac{1}{6}n(n+1)(2n+2)$?