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The tangent to the curve y=e^x drawn at ...

The tangent to the curve `y=e^x` drawn at the point `(c,e^c)` intersects the line joining `(c-1,e^(c-1)) and (c+1,e^(c+1))` (a) on the left of `n=c` (b) on the right of `n=c` (c) at no points (d) at all points

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