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Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 48)
What is the value of x when x
-2
= 4?
0.5
-0.5
2
-2
Maelezo
x
-2
=1/x
2
= 4, therefore x
2
=1/4 and x=-0.5 or +0.5
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