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Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 39)
Solve for x: 9
x
= 27
1
1.5
2
3
解释
Both 9 and 27 can be expressed with the same base of 3. 9 is 3 squared, and 27 is 3 cubed. (3
2
)
x
= 3
3
. Then 2x = 3, therefore x=1.5.
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