Item: tExtendGeometric2c
Stem:
Find the missing terms in the geometric sequence below:
2, __, 18, __, 162, ...
Inputs:
- Enter your answer here:
- and
Key:
- Observable: 6,
54.
Score: 1;
Evidence Value: 1.
-
Student:Right!
-
Teacher:The student correctly identified missing terms in a geometric sequence.
- Observable: 6,
.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not quite right. You found the first missing term correctly, but you made an error finding the second missing term.
-
Teacher:The student found the first missing term correctly, but made an error finding the second missing term.
- Observable: ,
54.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's not quite right. You found the second missing term correctly, but you made an error finding the first missing term.
-
Teacher:The student found the second missing term correctly, but made an error finding the first missing term.
- Observable: 10,
.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. It looks like you may have tried to find a missing terms by taking the average of the terms on either side. This would work for an arithmetic sequence, but not a geometric sequence.
-
Teacher:The student may have tried to find a missing term by averaging the terms on either side.
- Observable: ,
90.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. It looks like you may have tried to find a missing term by taking the average of the terms on either side. This would work for an arithmetic sequence, but not a geometric sequence.
-
Teacher:The student may have tried to find a missing term by averaging the terms on either side.
- Observable: .
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that was incorrect.
-
Teacher:The student got this item incorrect.
Metadata:
Item Node: tExtendGeometric2c,
Difficulty: 2.
Proficiencies: ExtendGeometric.