Question

sequences and series question. Please Help asap!!

Answer 1

Which represents the series in the expanded form:

Answer 2

A. 1+2+3+4+5
B.2+4+6+8+10
C. 2+3+4+5
D.2+3+4+5+6

Answer 3

so that bottom number says to start at j=1
so you evaluate the expression to the side of the sigma from j=1 to j=5 (because this is the number on top it tells you where to start)
One you have evaluated the expression 2j from j=1 to j=5
and put a plus sign between each you have your expansion

Answer 4

plug in 1 for j in 2j
plug in 2 for j in 2j
plug in 3 for j in 2j
plug in 4 for j in 2j
plug in 5 for j in 2j
put a plus sign between each of these evaluations

Answer 5

in between the 1,2,3,4,5?

Answer 6

no in between each of the expressions I told you to evaluate

Answer 7

okay

Answer 8

example \[\sum_{i=2}^{4}(3i-1)=(3*2-1)+(3*3-1)+(3*4-1)\]

Answer 9

2+4+6+8+10

Answer 10

yep that is it

Answer 11

thanks so much:)

Answer 12

np gj