Geometric Series Sigma

What is the sum of the first ten terms of the sequence 4, -12, 36, -108 . . . ?

• 59,050

• -59,048

• -78,732

• 118,096

The sum of the geometric series

• 
• 
• 8880

• There is no sum because it never ends.

What best describes the following infinite geometric series: 1/2 + 3/4 + 9/8 + ...

• Diverges

• Converges

Find the indicated sum for the geometric series.
S₆ for (-4/5) + 8 + (-80) + 800 + ....

• _S6 = 21,845

• _S6 = 72,000

• _S6 = 72,727.2

• _S6 = -128,840.8

Find a₁₂ in the sequence -1, -3, -9, -27, ...

• -177,147

• -19,683

• -59,049

• 118,098

What is the sum of the first 10 terms for the following geometric series:
1+1/2+1/4+1/8+1/16+...

• 0.999

• 0.002

• 9.8

• 1.998

Estimate the total sum. (Ans 0.5)

• 0.3333

• 0.5

• infinity

Convert to sigma notation
-4 + 8 -16 +32 - 64 + ... + 2048