Question

what is the sum of the arithmetic series

Answer 1

\[\sum_{t=1}^{18}(3t-4)\]

Answer 2

a. 234
b.441
c.25.5
d.49

Answer 3

\[\sum_{i=1}^{n}a_i=\dfrac{n}{2}(a_1+a_n)\]

Answer 4

how is that gonna help. idek how to plug anything in let alone understand it

Answer 5

it basically means, the (first term of the series + the last term) multiplied by the number of terms over 2

Answer 6

for example, if we were doing this example: