## bmelyk 2 years ago Write the following sums in summation notation.

1. bmelyk

$1+\frac{ 2 }{ 3 }+\frac{ 3 }{ 5 }+\frac{ 4 }{ 7 }+\frac{ 5 }{ 9 }+\frac{ 6 }{ 11 }+\frac{ 7 }{ 13 }$

2. bmelyk

not sure how to start it.

3. lemonbubblegum

can anything be reduced???

4. precal

|dw:1359576924956:dw|

5. precal

|dw:1359577005004:dw|

6. precal

|dw:1359577014900:dw|

7. precal

|dw:1359577090843:dw|

8. precal

ok just a lot of guess and check but that one works

9. bmelyk

i know those formulas but, im not sure how im supposed to start it. like how do you know what n equals?

10. bmelyk

@precal

11. precal

you can use n or k

12. precal

I just notice that the numerators were 1,2,3,4,5,6,7

13. precal

so I knew I could use n or n+1

14. precal

the denominators were odd 1,3,5,7,9,11,13 in math we use 2n+1 for odd for evens we use 2n

15. precal

I had to guess whether to use n=0 or n=1 as my first numbers, so that is why you see me testing them|dw:1359577972172:dw|

16. precal

there really is no one way to do these, just a lot of guess and check

17. bmelyk

that's kinda confusing lol.

18. precal

I showed you my way of thinking, just follow my slides in order. Math is all about patterns

19. bmelyk

yes but i don't see how you are guessing it.

20. bmelyk

i really don't understand what you are doing,

21. precal

I wrote my process out, sorry perhaps someone else can explain it to you

22. bmelyk

i just don't see what you are doing is all.

23. precal

sorry, series and sequences get easier when you have done many it takes time and experience I just used guess and check