Mitglied: yeliah

14 Questions
10 Answers

1227

+76

Consider the function f(x) = (e^x)*cos(x) with a domain of all real numbers... Please help!

Consider the function f(x) = (e^x)*cos(x) with domain . Find the range of x values in [0, 2pi] for which f is increasing, decreasing, concave up, and inflection points using interval notation and a list of x values for inflection points.
mehr ..

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yeliah 11.11.2020

828

+76

How can I find all possible functions of g(x)?

Let f(x) and g(x) be functions with domain . Suppose and the tangent line to f(x) at x=a is perpendicular to the tangent line to g(x) at x=a for all positive real numbers a. Find all possible functions g(x). mehr ..

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yeliah 03.11.2020

709

+76

derivative operation question, please help!

1. We can repeat the derivative operation: the second derivative f'' is the derivative of f', the third derivative f''' is the derivative of f'' , and so on. Find a function f such that f' and f'' are not the function 0, but f''' mehr ..

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yeliah 02.11.2020

468

+76

Derivative questions

A)
We can repeat the derivative operation: the second derivative is the derivative of , the third derivative is the derivative of , and so on. Find a function such that and are mehr ..

yeliah 31.10.2020

1676

+76

Find the value of k such that f(x) is differentiable at x=1. Please help!

A)
Find the value of k such that
is differentiable at x=1.

B) mehr ..

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yeliah 30.10.2020

605

+76

Centroid question

Let denote the centroid of triangle . Let and be points on sides and , respectively, so that and are collinear, and . Find .

Thanks in mehr ..

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yeliah 19.05.2020

559

+76

How can i find this?

The equation of the plane through the points and can be written as
Then what's the ordered triple ?

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yeliah 09.05.2020

678

+76

How do I do this?

Find the distance between and the line through and This distance is equal to for some integer d. What is d?

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yeliah 06.05.2020

634

+76

how do I solve this?

Consider the line through points and .
This line can be parametrized as for some choices of constants and . What is the ordered pair ?

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yeliah 04.05.2020

515

+76

How do I do this??

If there exists a matrix such that
calculate

I dont know how to start this problem, any hints? Thanks! mehr ..

yeliah 30.04.2020

635

+76

How do i find (a-b)/c?

Consider the vectors , and
If the vectors , and are linearly independent, answer with ? (a question mark.) If they aren't, find coefficients a,b and c, not all 0, such that and answer with .
mehr ..

heureka ●

yeliah 30.04.2020

652

+76

Invertible matrices

Let and be invertible matrices such that
Calculate

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yeliah 17.04.2020

546

+76

How do I find this vector?

Let be a matrix such that
for some value of x . What is the vector that maps to

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yeliah 15.04.2020

+76

Oh oops, I see. Do you know how I could get the graph within the range of [0, 2pi]? Thanks!

yeliah11.11.2020

#15

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Hi Melody,

Thank you so much for helping me. I under stand so much now!

yeliah06.11.2020

#11

+76

Hi Melody,

sorry it took so long to get back to you. I did more practice and tried integrating g.

I got -1/2 ln|2x|+C. Is that correct?

yeliah05.11.2020

+76

I do not know how to share my graph but i plugged in g as -1/4x^2

yeliah04.11.2020

+76

Hi asinus,

Thank you for you help!

I have plotted in f and g onto Desmos but I am unsure what to do now. How should I continue?

yeliah03.11.2020

+76

Hi Melody and asinus,

Thank you for you help!

I have plotted in f and g onto Desmos but I am unsure what to do now. How should I continue?

yeliah03.11.2020

+76

thank you so much!

I understand now!

yeliah03.11.2020

+76

sorry, should I repost?

yeliah02.11.2020

+76

Yes that makes sense! Thank you!!

yeliah05.05.2020

+76

The volume of the cup is 14.14 innches cube.

yeliah04.05.2020

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