a little confused-need help immediately please!!

Question

4. Express the series below in summation notation for the specified number of terms

b)10 + 14 + 18 + 22

 

c) 

Answer 1

Step 1:

(4b)

The series is .

The sum can be written as .

The sum has 4 terms, each of the form , and starts at and ends at .

The summation notation of is .

.

Step 2:

(4c)

The series is .

The sum can be written as .

The sum has 5 terms, each of the form , and starts at and ends at .

The summation notation of is .

.

Solution :

(4b) .

(4c) .