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Mathematics 10 Online
OpenStudy (thecalchater):

Calculus.

OpenStudy (thecalchater):

@freckles @mathmath333

OpenStudy (freckles):

which letter are you asking for help with

OpenStudy (thecalchater):

All of them if I get a and b i should be able to do c and d

OpenStudy (mathmath333):

2.) natural logarithm

OpenStudy (freckles):

I'm not sure what definition for e is being asked about in number 1 is this not known in class?

OpenStudy (freckles):

maybe it wants us to use \[\ln(x)=\int\limits_1^x \frac{1}{t} dt \\ \text{ and replace } x \text{ with } e^{e}\]

OpenStudy (thecalchater):

I think so maybe....

OpenStudy (thecalchater):

if so how would c and d work out?

OpenStudy (freckles):

\[\ln(e^e)=e \ln(e)=e(1)=e \\ e=\int\limits_1^{e^e} \frac{1}{t} dt\]

OpenStudy (freckles):

but I have no idea if that is what they are going for in number 1

OpenStudy (freckles):

perhaps it wants you to use it the other way you know ln(e)=1 so replace my above x in the definition for ln(x) with e

OpenStudy (thecalchater):

so replace what from the first equation to figure out C?

OpenStudy (freckles):

I was saying what you should do probably for number 1

OpenStudy (thecalchater):

oh ok. I googled that and the same equation you put came up.

OpenStudy (freckles):

\[ \\ \text{ we want to show } e>2\] so I would assume you would want to approximate ln(2) using the a finite amount of rectangles

OpenStudy (thecalchater):

ok so how do I do that?

OpenStudy (freckles):

take maybe like 4 rectangles on the given interval which is 1 to 2

OpenStudy (thecalchater):

I'm confused...

OpenStudy (freckles):

do you remember the integral definition of ln(x)?

OpenStudy (freckles):

\[\ln(x)=\int\limits_1^x \frac{1}{t} dt\]

OpenStudy (freckles):

we are using this to approximate ln(2)

OpenStudy (freckles):

\[\ln(2)=\int\limits_1^2 \frac{1}{t} dt \approx \text{... use one of those rules you learned to approximate the integral }\]

OpenStudy (freckles):

like midpoint rule or left endpoint rule or right end point rule

OpenStudy (freckles):

I would probably use both left endpoint and right endpoint rule

OpenStudy (freckles):

pretend you want 4 rectangles... what would be the base length of each rectangle?

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