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Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 2)
Which of the following is equivalent to (x
-1
+ y
-1
)?
x + y
1/(x+y)
1/x + 1/y
xy
Paliwanag
x
-1
is the same as 1/x, and y
-1
is the same as 1/y
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