Expanding using wolfram

- swissgirl

Expanding using wolfram

- jamiebookeater

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- swissgirl

@apoorvk

- swissgirl

wait i messed up the function

- swissgirl

idk how i am suppoosed to deal with this. Like i have mathematica but not either sure how to use it

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## More answers

- swissgirl

8.9824391E-7(x^6-94x^5+3529x^4-67624x^3+695548x^2-3624640+7425000)-3.04470962E-5(x^6-88x^5+3001x^4-49618x^3+397840x^2-1237600x)+2.822089947E-4(x^6-84x^5+2689x^4-40734x^3+288208x^2-742560x)- 3.25571254E-4(x^6-81x^5+2476x^4-35436x^3+234880x^2-571200x)+1.742019122E-4(x^6-77x^5+2220x^4-29884x^3+187520x^2-435800x)-6.2386735E-5(x^6-74x^5+2049x^4-26644x^3+162668x^2-371280x)+1.96362980E-6(x^6-66x^5+1681x^4-20556x^3+119980x^2-265200x)

- anonymous

8.98244x10^-7 (x^6-94 x^5 3529 x^4-67624 x^3 695548 x^2 3800360)-304471. (x^6-88 x^5 3001 x^4-49618 x^3 397840 x^2-1237600 x) 0.000282209 (x^6-84 x^5 2689 x^4-40734 x^3 288208 x^2-742560 x)-3.25571

- anonymous

That's what comes out when I pastein Wolfram...

- anonymous

What are you supposed to be doing, solve for x?

- swissgirl

ummm well actually it didnt allow u to paste everything cuz the input was too large and therefore u got the incorrect answer but i need to expand the following

- swissgirl

@ParthKohli @Hero Can you check this out?

- Hero

What are you trying to expand that for?

- swissgirl

Its expand and find like terms to get a single polynomial

- ParthKohli

Expand[expression]

- ParthKohli

Oh, then "expansion" is not the word.

- ParthKohli

Together[expression]

- Hero

@swissgirl, you should probably get maple, quick

- swissgirl

ohhhhhhhhh where wld i do that on wolfram or mathematica?

- swissgirl

I have mathematica but i have no clue how to use it

- ParthKohli

Mathematica, of course!

- swissgirl

Parth can u guide me step by step cuz i am stupiddddd

- ParthKohli

Just go to any notebook and type in "Together[your expression]".

- ParthKohli

And then, shift+enter for output.

- swissgirl

ohhhh ok let me try that give me a sec?
Hero do u have a program on maple for interpolating lagrange polynomials?

- anonymous

Maple is OK, got to type in a lot of *'s.....

- swissgirl

lol idk how to program at allllllll lol
So if the program isnt given to me then I wont know how to use it and for this specific section My textbook didnt provide coding so I am stuck

- ParthKohli

@swissgirl In Mathematica, click on Palettes on the menu bar. You should see a Basic Math Assistant.

- swissgirl

okkkkkk

- ParthKohli

There, you get a list of symbols and commands. :)

- anonymous

I suppose that mess is the n+1 points, is that it?

- swissgirl

yup lol

- swissgirl

its the \(f(x_n)*L_n(x)\) polynomials

- swissgirl

I got the wrong answer though. hmmm I wonder y

- swissgirl

What does together mean?

- swissgirl

@ParthKohli

- Hero

Wow, @swissgirl, I'm sorry you're experiencing such difficulty

- swissgirl

idk I plugged term by term into the calculator and got the correct answer but mathematica for some reason gave me the wrong answer

- anonymous

http://mathworld.wolfram.com/LagrangeInterpolatingPolynomial.html
Says Mathematica implents as InterpolatingPolynomial[data,var]

- ParthKohli

I don't know much about Math :P

- anonymous

http://reference.wolfram.com/mathematica/ref/InterpolatingPolynomial.html

- swissgirl

like look only the first polynomial has like a term without an x
8.9824391E-7(x^6-94x^5+3529x^4-67624x^3+695548x^2-3624640+7425000)
so 8.9824391E-7*7425000=6.67 but mathematica gives me this number that is wayyy offff

- swissgirl

THHANNNKKKKSSSS ESTUDIERRRRRRRRRRRR

- swissgirl

omg i have been sitting hours here.

- anonymous

I hope you can figure it out, I haven't Mathematica....

- swissgirl

@estudier I GOT THE CORRECT ANSWEERRRRRRRRRRR lol
OMG Finallllyyy

- swissgirl

@experimentX like y didnt mathematica process all my polynomials. It was giving me an incorrect answer

- experimentX

huh? really?

- swissgirl

yaaaaa its weird

- swissgirl

I may have inputed it incorrectly

- experimentX

what is this?
8.9824391 E - 7

- swissgirl

8.9824391*10^-7

- swissgirl

ohh mayge i gotta bracket the -7

- swissgirl

let me try that

- swissgirl

But which brackets would u suggest I use?

- experimentX

probably due to that ... try to input piecewise.

- experimentX

( ) small brackets

- swissgirl

THANKS :)

- swissgirl

nah it became wierder

- swissgirl

let me try 10^-n instead of E

- experimentX

8.9824391*10^(-7)

- experimentX

Or click (from menu) Palette > Basic math assistant

- swissgirl

much closer like just a bit off like instead of 6.67 i have 3.47

- swissgirl

idk whatever too bad

- swissgirl

Together[(8.9824391*10^-7) (x^6 - 94 x^5 + 3529 x^4 - 67624 x^3 +
695548 x^2 - 3624640 + 7425000) - (3.04470962*10^-5) (x^6 -
88 x^5 + 3001 x^4 - 49618 x^3 + 397840 x^2 -
1237600 x) + (2.822089947*10^-4) (x^6 - 84 x^5 + 2689 x^4 -
40734 x^3 + 288208 x^2 - 742560 x) - (3.25571254*10^-4) (x^6 -
81 x^5 + 2476 x^4 - 35436 x^3 + 234880 x^2 -
571200 x) + (1.742019122*10^-4) (x^6 - 77 x^5 + 2220 x^4 -
29884 x^3 + 187520 x^2 - 435800 x) - (6.2386735*10^-5) (x^6 -
74 x^5 + 2049 x^4 - 26644 x^3 + 162668 x^2 -
371280 x) + (1.96362980*10^-6) (x^6 - 66 x^5 + 1681 x^4 -
20556 x^3 + 119980 x^2 - 265200 x)]

- swissgirl

oh whoops in mathematica the exponent was where it needed to be

- experimentX

hmm ... try doing this in pieces ... check every polynomial

- swissgirl

ohhh should do that let me try that

- swissgirl

okkkk i think its because i rounded off a number. I think its my problem. Thankksss for helping me outtt :)))))))

- experimentX

no probs!! have fun swissgirl

- swissgirl

:)

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