Not really sure how to approach this one analytically, any clues?
x3 +2x = 5cos x
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You cannot solve for explicitly, you will need to use a numeric root finding technique, such as Newton's method to approximate the root. This is a method from differential calculus.
Oh I see, well I'm not familiar with such a technique so I guess a graphical solution will have to suffice. Thank you Mark!
You should find . This is what the computer returns, using a numeric method.
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