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Home school Calculas( high school level) 
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#1
May607, 05:18 PM

#2
May607, 07:41 PM

P: 312

For #4, the derivative is a quadratic. There are 2 places where the tan line has a slope of 5. Find the points where it equals 5 (or where that minus 5 equals zero) and then you have 2 points and 2 slopes



#3
May607, 08:21 PM

P: 20

8. If he's traveling at 150 km/h, then that's how fast the distance is changing. For b, it depends. If it went past his destination before 10:50, then the distance is increasing, otherwise it's decreasing.



#4
May607, 10:23 PM

P: 3

Home school Calculas( high school level)
Also can anyone check the solutions i did, thanks 


#5
May707, 05:40 AM

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P: 39,363

"For quadratic equation i would need a,b and c. but i have only 2 numbers......and how would i find the point where the point equals 5? "
A "point" can't equal 5! You are looking for the value of x such that the derivative 3x^{2}+ 2= 5. Surely you can solve that equation. 


#6
May707, 07:38 AM

P: 14

For #1 the final answer(first derivative) is [tex](e^{4x} \cdot 2x^2) \cdot (4x+3)[/tex] not 2x + 3...you multiplyed by 2 insted 4...
Edit...even more simple it is if you leave it like this [tex]6x^2 e^{4x} + 8x^3 e^{4x}[/tex] and make a second derivative... 


#7
May707, 10:42 PM

P: 3

thank you everyone for your help:) 


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