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balu736 [363]
3 years ago
5

Brittany has lunch at a restaurant. Her bill was $14.50,

Mathematics
1 answer:
STALIN [3.7K]3 years ago
8 0

Answer:

I don't know, I'm just doing this to get points. lol

Step-by-step explanation:

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Find dy/dx using first principle<br>x+1/x​
JulsSmile [24]

Answer:

The derivative of the function is:

f'(x)=1-\frac{1}{x^{2}}

Step-by-step explanation:

The first principle is given by:

f'(x)=\frac{dy}{dx}=lim_{h\rightarrow 0}\frac{f(x+h)-f(x)}{h}

The function here is:

f(x)=x+\frac{1}{x}

Now, using the first principle we have:

f'(x)=lim_{h\rightarrow 0}\frac{(x+h)+\frac{1}{(x+h)}-x-\frac{1}{x}}{h}  

=lim_{h\rightarrow 0}\frac{h+\frac{1}{(x+h)}-\frac{1}{x}}{h}    

=lim_{h\rightarrow 0}\frac{h-\frac{h}{x(x+h)}}{h}    

=lim_{h\rightarrow 0}\frac{h(1-\frac{1}{x(x+h)})}{h}

=lim_{h\rightarrow 0}1-\frac{1}{x(x+h)}

=1-\frac{1}{x^{2}}

 

Therefore, the derivative of the function is:

f'(x)=1-\frac{1}{x^{2}}

I hope it helps you!  

 

6 0
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Answer:

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Step-by-step explanation:

I used a calculator btw

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