0
Assume that the expression is:
y = 9e^(t)
Remember that the derivative of e^(t) with respect to t is e^(t). If we take the derivative of the function y, we have..
dy/dt = 9 d[e^(t)]/dt
= 9e^(t)
Note that I factor out the constant 9. If we keep the 9 in the brackets, then the solution doesn't make a difference.
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