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Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 30)
Evaluate: 9
1/2
- 4
1/2
1
2.5
5
13
解释
9
1/2
is the square root of 9, which is 3. 4
1/2
is the square root of 4 which is 2. Thus 3-2=1
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