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[tex]\int \frac{dx}{(x-2)(x^2+4)}[/tex]....for some reason I cant equate the coefficients?..is there something else.i used A/x-2 + B/(x^2+4)

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- Thread starter suspenc3
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- #1

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[tex]\int \frac{dx}{(x-2)(x^2+4)}[/tex]....for some reason I cant equate the coefficients?..is there something else.i used A/x-2 + B/(x^2+4)

- #2

StatusX

Homework Helper

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[tex]\frac{A}{x-2}+\frac{Bx+C}{x^2+4}[/tex]

Now you have as many equations (equating the coefficients of 1, x and x

- #3

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ohhh..ok Thanks!

- #4

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I have another question..Im just starting ttrapezoidal rule, are you suppose to use a calculator or?

- #5

StatusX

Homework Helper

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- #6

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Anyway, I'd imagine that you're supposed to use a calculator to go through the approximations, or if it is one of that calc classes where you aren't allowed to use a calculator then you should just put all your work down and they will grade based on that (so much easier).

- #7

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Hi, late response sorry, I am doing pretty complex numbers..I dont think I could do them in my head..like [tex](1.6+1)^1^/^4[/tex] and cosine of a fraction etc...Ive never really used a calculator fot he past 3 years and I dont see why we would all of a sudden need one... Also..is it just me or is the trap and simpson rule pointless and out of place..it just seems too easy...i dddddddunno

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