+0  
 
0
212
1
avatar+946 

Got it

Julius  Oct 3, 2017
edited by Julius  Oct 3, 2017
 #1
avatar+87301 
+3

y=ab^x

 

The derivative of this function, dy/dx, will be the slope of the tangent line at any point. It is given by :

 

dy / dx  =    a * (ln b) * b^x

 

since b > 1,  ln b and b^x  will always be positive.........and a is always positive

 

So.....the slope of a tangent line will never = 0

 

 

cool cool cool

CPhill  Oct 3, 2017

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