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JAMB - Mathematics (2014 - No. 6)
Solve for x in 8x
-2
= 2/25
4
6
8
10
解释
8x
-2
= 2/25
x
-2
= 2/25 x 1/8
x
-2
= 2/200
x
-2
= 1/100
1/x
2
= 1/100
x
2
= 100
x = 10
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