Geometric Sequences and Summing Geometric Sequences

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

• 59,050

• -59,048

• -78,732

• 118,096

• -86

• -87

• -85

Find the sum of this geometric sequence:
-1, -3, -9, - 27,...  n=8

• -3280
• -3135
• -3323
• -3343

Find the sum of this geometric sequence:
4, - 8, 16, - 32,...  n=7

• 195
• 172
• 202
• 145

Find the sum of this geometric sequence:
-4 - 8 - 16 - 32...,  n=6

• -253
• -252
• 4
• -235

What is the sum of the first 10 terms for this geometric sequence:
2, -6, +18, -54,... ?

• -29525

• 29525

• 25925

• -29526

You have $10 in your bank account.  It doubles every month.  How much money will you have after 5 months?

What is the common ratio of this geometric sequence?

5, 15, 45, 135, ...

Find the sum of this geometric sequence.

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