Question

.Find the 9th partial sum of the summation of 3i minus 4, from i equals 2 to infinity.
102

100

205

200

Answer 1

@jdoe0001

Answer 2

not sure there's a formula for the partial summation
so... you may end up just doing it by a plain sum of each term

Answer 3

How? ;c

Answer 4

well 3(2)-4 1st
+3(3)-4 2nd
+3(4)-4 3rd
+3(5)-4 4th
+3(6)-4 5th
+3(7)-4 6th
+3(8)-4 7th
+3(9)-4 8th
+3(10)-4 9th

Answer 5

So you find that, then add all the values?

Answer 6

yes

Answer 7

i got 100 ;o

Answer 8

hmm I got a bit bigger number, 155

Answer 9

:c 155 isnt an answer choice though D;

Answer 10

right I was saying .. but the site got a bit lagged

yours is correct... I just added extra anyhow -> https://www.google.com/search?client=opera&q=(3*2-4)%2B(3*3-4)%2B(3*4-4)%2B(3*5-4)%2B(3*6-4)%2B(3*7-4)%2B(3*8-4)%2B(3*9-4)&sourceid=opera&ie=utf-8&oe=utf-8&channel=suggest&gws_rd=ssl

Answer 11

Thank you c:

Answer 12

yw