Find the common ratio for the following geometric sequence:
0.32, 0.16, 0.08, 0.04, 0.02, . . .
Enter your answer here:
0.5
Right!
The student got this item correct.
-0.16
Sorry, that's incorrect. Perhaps you calculated the second term minus the first term. But for this geometric sequence, the difference between successive terms is not the same. For example, 0.16 minus 0.32 is -0.16, but 0.08 minus 0.16 is -0.08. The ratio between successive terms is the same, however.
The student probably confused the common ratio of a geometric sequence with the common difference of an arithemetic sequence.
-0.02
Sorry, that's incorrect. Perhaps you calculated the fifth term minus the fourth term. But for this geometric sequence, the difference between successive terms is not the same. For example, 0.16 minus 0.32 is -0.16, but 0.08 minus 0.16 is -0.08. The ratio between successive terms is the same, however.
The student probably confused the common ratio of a geometric sequence with the common difference of an arithemetic sequence.
Sorry, that was incorrect.
The student got this item incorrect, but it is not clear why.
CommonRatio