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Derivatives of Logs and Exponentials

Authored by Danielle Kasprzak

Mathematics

10th - 12th Grade

Used 17+ times

Derivatives of Logs and Exponentials
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8 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the rule for taking the derivative of

 f(x)=log⁡auf\left(x\right)=\log_au  

 f′(x)=uln⁡af'\left(x\right)=\frac{u}{\ln a}  

 f′(x)=u′×u×ln⁡af'\left(x\right)=u'\times u\times\ln a  

 f′(x)=u′uln⁡af'\left(x\right)=\frac{u'}{u\ln a}  

 f′(x)=1uln⁡af'\left(x\right)=\frac{1}{u\ln a}  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the rule for taking the derivative of

 f(x)=auf\left(x\right)=a^u  

 f′(x)=uln⁡af'\left(x\right)=\frac{u}{\ln a}  

 f′(x)=u′⋅u⋅ln⁡af'\left(x\right)=u'\cdot u\cdot\ln a  

 f′(x)=uln⁡af'\left(x\right)=u\ln a  

 f′(x)=1uln⁡af'\left(x\right)=\frac{1}{u\ln a}  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the derivative of 

 f(x)=32x2f\left(x\right)=3^{2x^2}  

 f′(x)=ln⁡3⋅2x2f'\left(x\right)=\ln3\cdot2x^2  

 f′(x)=4x⋅32x2⋅ln⁡3f'\left(x\right)=4x\cdot3^{2x^2}\cdot\ln3  

 f′(x)=2x2⋅3x2f'\left(x\right)=2x^2\cdot3^{x^2}  

 f′(x)=2x2⋅32x2⋅ln⁡3f'\left(x\right)=2x^2\cdot3^{2x^2}\cdot\ln3  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the derivative of

 f(x)=log⁡5(4x − 3)f\left(x\right)=\log_5\left(4x\ -\ 3\right)  

 f′(x)=4(4x−3)ln⁡5f'\left(x\right)=\frac{4}{\left(4x-3\right)\ln5}  

 f′(x)=44x−3f'\left(x\right)=\frac{4}{4x-3}  

 f′(x)=(4x−3)ln⁡5f'\left(x\right)=\frac{\left(4x-3\right)}{\ln5}  

 f′(x)=4ln⁡5f'\left(x\right)=\frac{4}{\ln5}  

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the derivative of

 f(x)=log⁡7(sin⁡x)f\left(x\right)=\log_7\left(\sin x\right)  

 f′(x)=cot⁡xln⁡7f'\left(x\right)=\frac{\cot x}{\ln7}  

 f′(x)=tan⁡xln⁡7f'\left(x\right)=\frac{\tan x}{\ln7}  

 f′(x)=1sin⁡x(ln⁡7)f'\left(x\right)=\frac{1}{\sin x\left(\ln7\right)}  

 f′(x)=1cos⁡x(ln⁡7)f'\left(x\right)=\frac{1}{\cos x\left(\ln7\right)}  

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the derivative of 

 f(x)=5cot⁡xf\left(x\right)=5^{\cot x}  

 f′(x)=5cot⁡xln⁡5f'\left(x\right)=5^{\cot x}\ln5  

 f′(x)=cot⁡x⋅5cot⁡x⋅ln⁡5f'\left(x\right)=\cot x\cdot5^{\cot x}\cdot\ln5  

 f′(x)=cot⁡x⋅5cot⁡xf'\left(x\right)=\cot x\cdot5^{\cot x}  

 f′(x)=−csc⁡2x⋅5cot⁡x⋅ln⁡5f'\left(x\right)=-\csc^2x\cdot5^{\cot x}\cdot\ln5  

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the derivative of 

 f(x)=log⁡9(2x4)f\left(x\right)=\log_9\left(2x^4\right)  

 f′(x)=4xln⁡9f'\left(x\right)=\frac{4}{x\ln9}  

 f′(x)=8x3ln⁡9f'\left(x\right)=\frac{8x^3}{\ln9}  

 f′(x)=12x4ln⁡9f'\left(x\right)=\frac{1}{2x^4\ln9}  

 f′(x)=2x4ln⁡9f'\left(x\right)=\frac{2}{x^4\ln9}  

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