Question

Evaluate the summation of 3 n plus 2, from n equals 1 to 14..

Answer 1

3n+2 from n 1 to 14
3(sum(n))+(14)*2

Answer 2

sum(x) from 1 to n = n(n+1)/2

Answer 3

so it becomes 3(14(14+1)/2) +28
@KaylaHake can you solve now?

Answer 4

yeah i was able to solve it

Answer 5

could you help me with another one?

Answer 6

Evaluate the summation of 25 times 0.3 to the n plus 1 power, from n equals 2 to 10..

Answer 7

sure post a new question and tag me in

Answer 8

@ankit042

Answer 9

\(\LARGE\color{blue}{ \bf 3n+2 }\) is, as you can tell, an arithmetic sequence where the rate of change or the growth of each next term is 3. (you can call it a "slope" 3)

\(\LARGE\color{blue}{ \bf 3(1)+2=3+2=5 }\)
\(\LARGE\color{blue}{ \bf 3(2)+2=6+2=8 }\)
\(\LARGE\color{blue}{ \bf 3(3)+2=9+2=11 }\)

The formula of a sum for this sequence would be,

\(\LARGE\color{blue}{ \bf \frac{14(a_1+a_{14})}{2} }\)

Answer 10

you can find a14 by simply plugging in 14 for n, into 3n+2.

Answer 11

OPEN THE PIC :)