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Math in the real world
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7 comments:
I have an calculus question. I'm supposed to integrate this:
arctan(sqrt(x))
We just learned trig substitution but the substitutions I'm doing just make the problem worse. Please help!
Im in algebra and I need help solving a problem. I have to solve this equation by finding the zeros.
x^3 - 19x - 30
thanks!
We did both of the above questions on the broadcast today.
For the calculus question, our tutor Derek found another way to do it which you may or may not prefer! He substituted x=tan^2(theta) so that tan^-1(sqrt(x)) becomes just theta, and dx becomes 2*tan(theta)*sec^2(theta) d theta. You still have to integrate by parts though!
I have a system of linear equations that I can't solve. I'm a Palomar student. Can you help me? Thank you!
(3/4)x - (1/3)y + (1/2)z = 9
(1/6)x + (1/3)y - (1/2)z = 2
(1/2)x - y + (1/2)z = 2
Stephanie, we will do this one on tomorrow's program. If you aren't able to catch that, email us at mathline@palomar.edu and we'll send some email help.
Stephanie again: we did the problem on the show but it didn't end up correct because one equation was miscopied at one point! Let us know if you need additional help on it.
I'm in algebra and I have to somplify this problem:
log(2x+3)+log(4x-6)
I factored the log out of both terms and got log(6x-3) but the book has a different answer. please help!
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