Question

the sum of the first 46 terms of the sequence 2, -1, -4, -7

Answer 1

The formula for the sum of an arithmetic sequence is:


\(\Large \color{MidnightBlue}{\Rightarrow {n \over 2}(a_{1} + a_{n}) }\)

Answer 2

To find the 46th term:


\(\Large \color{MidnightBlue}{\Rightarrow a_{1} + (n - 1)d }\)

Answer 3

a = a1 + (n – 1)d
The first term is a1, the common difference is d, and the number of terms is n.

Answer 4

2+(46-1)(-3)=,,,,,,,,,,,,,,,