Question

Which of the following graphs could be a representation of a geometric sequence?

Answer 1

D is linear so no

B and C definitely, yes

A I am not sure about, I don't think the terms can converge to a nonzero value

so B + c only is my best attempt

Answer 2

The problem with A is that there is no constant common ratio

Compare the values of consecutive terms, or easier terms that are so many terms apart:

eg \(\dfrac{ar^4}{ar} = r^3\text{ vs } \dfrac{ar^7}{ar^4} = r^3\)

In A, the ratio between the terms is decreasing as the series goes on