Summation Notation, Geometric and Arithmetic Series

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)

Calculate the final sum/total of the series.

• 6
• 21
• 9
• 2

The summation is the same as which series?

• (4+10) + (4+20) + (4+30) + (4+40) + (4+50) + (4+60) + (4+70) + (4+80) + (4+90) + (4+100) + (4+110)
• 1+2+3+4+5+6+7+8+9+10+11
• 4 + 110
• 4 + 10

Is this summation finite or infinite?

• Finite, because there are only 6 terms to add up.
• Infinite, because there are an infinite number of terms to add up.

Is this sum finite or infinite?

• Finite, because there are 4 terms to add up.
• Infinite, because there are an infinite amount of terms to add up (m goes from 1 to infinity).

Which sequence is represented by the equation 2(7)^n-1 ?

• 7, 14, 28, 56...
• 2, 14, 98, 686...
• 2, 9, 16, 23...
• 7,9,11,13...

Which recursive formula best describes the sequence
2, -6, 18, - 54... 

• a_n=a_n-1* -4, a₁ = 2
• a_n=a_n-1* - 8, a₁ =2
• a_n=a_n-1* 2, a₁ = -3
• a_n=a_n-1* -3, a₁ =2

What is the common ratio for the sequence:
28, 14, 7, 3.5...

• 2
• 1/2
• -14
• -7

The explicit formula is used to find a specific term in a sequence.

• True
• False

Find a₉ in the sequence 4, 8, 16, 32, ... 

• 384
• 512
• 768
• 1,024