d(- 0.00000003*X6 0.00001*X5 - 0.0018*X4 0.1576*X3 - 7.5998*X2 201.2044*x - 2048.025)/dx = 0

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- Jun 28th 2006, 10:19 PMbobby77calculus help!
d(- 0.00000003*X6 0.00001*X5 - 0.0018*X4 0.1576*X3 - 7.5998*X2 201.2044*x - 2048.025)/dx = 0

- Jun 28th 2006, 11:46 PMRich B.
d(- 0.00000003*X6 0.00001*X5 - 0.0018*X4 0.1576*X3 - 7.5998*X2 201.2044*x - 2048.025)/dx = 0

Hi:

The expression, as written, appears to be the derivative of a 6th degree polynomial function. An example of Such a function is:

f(x) =__1.2x^6__+__7x^5__-__x^4__+__dx^3__-__0.414x^2__+__4x__+__5__

For simplicity, I have underscored each of the 7 terms given. The important thing to notice here is that*every pair of consecutive terms is combined by way of*(e.g.,**+**or**-**__7x^5__**-**__x^4__,__4x__**+**__5__, etc.).

But your expression has no operation between - 0.00000003*X6 and 0.00001*X5, nor between 0.0018*X4 and 0.1576*X3.

I suggest that you should recheck the problem as was presented to you, looking for the missing operation signs as discussed above.

Regards,

Rich B. - Jun 28th 2006, 11:50 PMCaptainBlackQuote:

Originally Posted by**bobby77**

RonL