Question

find the first term of the arithmetic sequence having the data given.

an = 48, Sn = 546, n = 26

Answer 1

Do you know the formula?

Answer 2

ish... not that well. Im just starting this and I just need some examples done.

Answer 3

\[\S_{n}=\frac{n}{2}(a_{1}+a_{n})\]

Answer 4

Sum..
\[\LARGE Sn=\frac n2 [2a_1+(n-1)\cdot d]\]

\[\LARGE a_n=a_1+(n-1)\cdot d\]