Help in Math Question - Page 4 - Study and Job Offers - HWzone Forums
adplus-dvertising
Skip to content
  • Create an account
  • About Us

    Hello Guest!

     
    Please note - in order to participate in our community, comment and open new discussions, you must join as a registered member.

    Our members enjoy many advantages, including the ability to participate in discussions, enjoy raffles and promotions for members of the site, and receive our weekly content directly by email.

    Do not like being harassed by email? You can register for the site but do not submit your registration to the weekly email updates.

Help with math


kdani

Recommended Posts

  • תגובות 50
  • Opens on
  • Last comment

Step Step:

The projection of the tangent length on the Y axis is X ^ 2 + 9.

The derivative is 2X, and so the tangent length projection on the X axis is X ^ 2 + 9) / 2X).

The sum of these two factors squared gives us the function we are trying to minimize (the root can already be thrown at this point, and also say that we are only looking for the positive X due to the symmetry). Note that after uploading the square of these expressions as they get the maximum holding of X is 4 and the minimum is 2-. After the derivation, the 3 and 3 holdings are obtained, hence the sixth hold of the final polynomial.

Link to content
Share on other sites

I got the equation

8t

⁶ + 73t⁴ - 81 = 0

Its solutions:

1

-1

3i

-3i

i * sqrt8 / 3

i * sqrt8 / 3-

You have the 1, -1 solutions in the equation, which is the solution, but the other solutions are different (- + sqrt (0.125) i). Someone here is wrong. DCAG, please list your solution. My path is the same as Vic's.

Link to content
Share on other sites

The tangent equation: L = 2ax-a ^ 2 + 9

Launch Point: (a, a ^ 2 + 9), v. The tangent of the tangent with the X axis: ((a ^ 2-9) / 2a, 0)

The distance equation between them: y = sqrt [((a ^ 2-9) / 2a-a) ^ 2 + (0- (a ^ 2 + 9)) ^ 2]

After arrangement, it looks like this: y = (a ^ 2 + 9) * sqrt (1 + 4a ^ 2) / 2a

tea. a! = 0

הנגזרת: y'=[2a*2a-2(a^2+9)]*sqrt(1+4a^2)/4a^2 + (a^2+9)*8a/(2a*2*sqrt(1+4a^2)) = (a^2-9)*sqrt(1+4a^2)/2a^2 + (2a^2+18)/sqrt(1+4a^2)

We will compare y '= 0 and after arranging we will come to the equation: 8a ^ 4 + a ^ 2-9 = 0

נגדירa^2=t ונמצא: t1=1,t2=-18/16

I did not refer to the composite solution but you can see that the results of a are:

a=+1,-1,+0.75*sqrt(2)i,-0.75*sqrt(2)i

So many signs ..., just that they don't jump parentheses from start to finish = /.

Link to content
Share on other sites

ארכיון

This discussion has been archived and new comments can not be added.


  • Latest news

  • Buzz-Zone: Everything hot on the net

×
  • Create new ...

At the top of the news:

Sony's Power Show

The Japanese maker has made an impressive appearance for its PlayStation 5 console, with a large number of new gameplay videos and some special surprises

new on the site