For , , R, if x 0 x2 x + ( - 1)ex2 2x - x = 3, then + - is equal to :
(4) 7
As x 0 the denominator 0, so the numerator must also 0:
- 1 = 0 = 1
Limit becomes x 0 x2 x 2x - x; numerator x3.
2x - x = (2 - )x - (2x)36 +
If 2 the limit is 0, so = 2 and denominator - 43x3.
- 43 = 3 = -4
+ - = 2 + 1 + 4 = 7
Answer: (4)
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