Search:
Advanced Search
User ID:
Password:
Forgot Login Details?
Home
Math Dictionary
HomeWork Help
Elementary Math
Middle school Math
High School Math
Solved Examples
Home WorkHelp Archive
Math Articles
Math Formulae
FeedBack
This Site is best viewed in Internet explorer6.0+ and FireFox.
Solved Examples
Curriculum:
Arizona Academic Content Standards
Click to change Curriculum
Topic:
Sequences and Series
Click to change Topic
Lesson:
3.1.PO 1-3: Arithmetic Series
Click to change Lesson
<<Previous
<<Back to List>>
Next>>
Attempt following question by selecting a choice to answer.
c
∑
k=1
8
(5
k
+ 13) = ?
cc cc
A.
c
284
B.
c
384
C.
c
276
D.
c
1136
c
A
View Solution Steps
Step 1:
a
k
= 5
k
+ 13
Step 2:
a
1
= 5(1) + 13 = 18;
a
8
= 5(8) + 13 = 53[Substitute the values.]
Step 3: S
n
=
n
[
a
1
+
a
n
]
2
[Sum of first
n
terms.]
Step 4: S
8
=
8[18+53]
2
[Substitute the values.]
Step 5: S
8
= 4(71) = 284
Step 6: So,
∑
k=1
8
(5
k
+ 13) = 284
Request for Email
* Please give a valid email id.
* Log into the site atleast once.
Enter your Mail Id: