题目信息
If 
, then the value of which of the following can be determined?
, then the value of which of the following can be determined?
A:I only
B:III only
C:I and II only
D:II and III only
E:I, II, and III
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已选答案：
正确答案：
C:I and II only
Algebra Simplifying algebraic expressions
Substitute 2t for s in the expressions given in I, II, and III.
✓ I. Value can be determined:
= 1
✓ II. Value can be determined:
= 1
× III. Value cannot be determined:
equals 0 if t = 1, and equals 
if t = 2
The correct answer is C.
Substitute 2t for s in the expressions given in I, II, and III.
✓ I. Value can be determined:
= 1✓ II. Value can be determined:
= 1× III. Value cannot be determined:
equals 0 if t = 1, and equals if t = 2The correct answer is C.
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