Understanding and applying arithmetic series

Calculate the sum of the 100th term and 200th term of the sequence 6, 15, 24, 33, ... ...

(a)  

• 4n+2

• 6n-2

• 6n

• 3n+6

Find the sum of the first 25 terms of the sequence below:

a_n = 5n + 1

• 126

• 1650

• 3300

• 2650

In an arithmetic sequence, the fifth term is 34 and the tenth term is 43. Find the sum of the first 20 terms of the sequence.

• 878

• -878

• 787

• -787

Determine the sum of the series written in Sigma Notation. 

• 5400
• 2692
• 2700
• 2704

Find the indicated sum of the arithmetic series if  $a_1=58,\ n=18,\ a_n=14$  

• 648

• 666

• 630

• 612

Find the sum of the arithmetic series...

3 + 5 + 7 + . . . + 17

• 32

• 80

• 70

• 160

Determine a sum of a given finite AR sequence:

S₄₀₀ = 2 + 4 + 6 + …. + 798 + 800

(a)  

How many terms does the sequence 1, 2, 3, 4,...99 have

• 99

• 100

• 48

• It's not possible to answer this!

This summation is the same as which series?

• 1 + 2 + 3 + 4 + 5 + 6
• (1 - 2) + (2 - 2) + (3 - 2) + (4 - 2) + (5 - 2) + (6 - 2)
• (1 - 2) + (6 - 2)
• (1 - 2) + (2 - 2) + (3 - 2) + (4 - 2)