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# Newton - Raphson question watch

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1. Find all solutions using the Newton Raphson method correct to 4dp of

5x + ln(x)=10,000

Intuitively I thought one of my solutions should be around 2000. However, my working out alludes to something completely different and I cant quite see where I've gone wrong. I'll post my working out next ...
3. (Original post by ElDonCorleone)
...

You forgot the 10000
4. i) make it equal zero:

5x + ln(x) - 10000 = 0

f(x) = 5x + ln(x) - 10000

f'(x) = 5 + 1/x

then put these together...

xn+1 = xn - f(xn)/f'(xn)
5. (Original post by RDKGames)

You forgot the 10000
Ahh so trivial, thanks!

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Updated: March 8, 2018
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