The equation of the tangent to the curve \[y=b{{e}^{-x/a}}\] at the point where it crosses the y-axis is

The equation of the tangent to the curve \[y=b{{e}^{-x/a}}\] at the po

1.	The equation of the tangent to the curve \[y=b{{e}^{-x/a}}\] at the point where it crosses the y-axis is
A.	\[\frac{x}{a}-\frac{y}{b}=1\]
B.	\[ax+by=1\]
C.	\[ax-by=1\]
D.	\[\frac{x}{a}+\frac{y}{b}=1\]
Answer» E.

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The equation of the tangent to the curve \[y=b{{e}^{-x/a}}\] at the point where it crosses the y-axis is

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