Item: tExtendGeometric1c
Stem:
Find the missing terms in the geometric
sequence below.
__, 4, 8, 16, __, ...
Inputs:
- Enter your answers here:
- and
Key:
- Observable: 2,
32.
Score: 1;
Evidence Value: 1.
-
Student:Right!
-
Teacher:The student got this item correct.
- Observable: 0,
20.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. The sequence is geometric, not arithmetic. It looks like you may have found the difference between the second and third terms, and used this difference to find the missing terms.
-
Teacher:The student got this item incorrect. It is a geometric sequence, but the student may have assumed it was an arithmetic sequence.
- Observable: -4,
24.
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that's incorrect. The sequence is geometric, not arithmetic. It looks like you may have found the difference between the third and fourth terms, and used this difference to find the missing terms.
-
Teacher:The student got this item incorrect. It is a geometric sequence, but the student may have assumed it was an arithmetic sequence.
- Observable: 32,
64.
Score: 0;
Evidence Value: 0.
-
Student:You are very close, but that's incorrect. Perhaps you did not read the question carefully. You need to find the first and fifth terms, not the next two terms.
-
Teacher:The student answered the question incorrectly, but this was probably due to misreading the question, rather than a lack of understanding.
- Observable: 2,
.
Score: 0;
Evidence Value: 0.
-
Student:You found the first term correctly, but you made an error finding the fifth term.
-
Teacher:The student answered the question incorrectly, but found one term correctly.
- Observable: ,
32.
Score: 0;
Evidence Value: 0.
-
Student:You found the fifth term correctly, but you made an error finding the first term.
-
Teacher:The student answered the question incorrectly, but found one term correctly.
- Observable: .
Score: 0;
Evidence Value: 0.
-
Student:Sorry, that was incorrect.
-
Teacher:The student got this item incorrect.
Metadata:
Item Node: tExtendGeometric1c,
Difficulty: 1.
Proficiencies: ExtendGeometric.