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Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 19)
Find the value of x in the equation: (5
x
)
2
= 625
2
3
4
5
解释
(5
x
)
2
= 5
2x
, and 625 is 5
4
; 2x = 4 => x=2
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