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At the point `P(a, a^n)` on the graph of `y = x^n, (n in N)`, in the first quadrant, a normal is drawn.
The normal intersects the y-axis at the point (0, b). If `lim_(a->0)b=1/2` then n equals
A. |
1 |
B. |
3 |
C. |
2 |
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D. |
4 |