Four students wrote sequences during math class. andre mc011-1.jpg brenda mc011-2.jpg camille mc011-3.jpg doug mc011-4.jpg which student wrote a geometric sequence?

A geometric sequence is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.

The common ration is obtained by dividing the a term by the preceding term.

Given that four students wrote sequences during math class with
Andre writing
Brenda writing
Camille writing
Doug writing

Notice that the common ratio for the four students is .

For Andre, the last term is wrong and hence his sequence is not a geometric sequence.
For Brenda, the last term is wrong and hence her sequence is not a geometric sequence.
For Camille, her sequence is not a geometric sequence.
For Doug, his sequence is a geometric sequence with a common ratio of .

Therefore, Doug wrote a geometric sequence.

Difference means subtraction