Posted by **Jess** on Wednesday, April 3, 2013 at 9:42pm.

I have 3 questions I'm stuck on and would love for someone to explain and show me how to solve them so I can also solve the other one.

Find the partial sum S6

1. An=3n+2

2. Find the number of terms n in an arithmetic sequence if a1=20, d=5, and An=75.

3. Find the general term for 8,17,26,35,44......

- Algebra -
**bobpursley**, Wednesday, April 3, 2013 at 10:05pm
3. 8, 8*2+1, 8*3+2, 8*n+n-1

or An=9n-1

- Algebra (Partial) -
**PsyDAG**, Wednesday, April 3, 2013 at 10:14pm
3. x + 9

- Algebra -
**Reiny**, Wednesday, April 3, 2013 at 10:59pm
#2

Term(n) = a+(n-1)d

75 = 20 + (n-1)(5)

55 = 5(n-1)

11 = n-1

n = 12

there are 12 terms

- Algebra -
**Jess**, Wednesday, April 3, 2013 at 11:03pm
Thanks for the help bobpursley and Reiny I appreciate showing how you got to it so I can also do it.

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