Question

Use summation notation to write the series 2.2+6.6+11+.. for 5 terms
Note: In each of these images, the lower limit of the summation notation is either "n=1" or "n=0".

Answer 1

\[\sum_{n=0}^{4}2.2 + 4.4n\]

Answer 2

2.2 + 4.4*0 + 2.2 + 4.4*1 + 2.2 + 4.4*2 + 2.2 + 4.4*3 + 2.2 + 4.4*4
2.2 6.6 11 .......................

Answer 3

is it -22+4.4n

Answer 4

\[\sum_{n=0}^{4}2.2\left( 2n+1 \right)\]

Answer 5

Thanks

Answer 6

You can't read what I wrote? My summation expression says 2.2 + 4.4n

Answer 7

so it is 5 instead of 4

Answer 8

but that is not one of the choice

Answer 9

There are many different ways to answer. Didn't know it was multiple choice. My way is one. Surjithayer's is another. Plus there are others

Answer 10

If they give you answer choices...the easiest way is probably to try each one to see which one give you 2.2 6.6 11 etc

Answer 11

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Answer 12

\[\sum_{n=1}^{5}\left\{ 2.2+\left( n-1 \right)4.4 \right\}\]

Answer 13

ok that is what I have but it is a negative -2.2

Answer 14

\[\sum_{n=1}^{5}-2.2+4.4n\]

Answer 15

yes

Answer 16

\[=\sum_{n=1}^{5}\left\{ 2.2-4.4+4.4n \right\}=\sum_{n=1}^{5}\left( -2.2+4.4 n \right)\]

Answer 17

Thank you

Answer 18

@surjithayer LOL...How many ways can we think of??

Answer 19

ok

Answer 20

there are so many ways. All are correct.