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Jusunlee.com Forums > Education > Homework Help > i kno u guyz r smart! so if u help me, i'll luv u forever and ever~~~~~~~~
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OrangeeeGirL
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Registered: Oct 2002
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i kno u guyz r smart! so if u help me, i'll luv u forever and ever~~~~~~~~

ok..calculus isn't really my subject..so help me out here
if u can answer any of these questions and show work...i'll be so thankful..
try working from the last question and up cuz i think the last ones r the harder ones =.=
ok u have to find derivatives (spelling? dunno)
f(x) = (x+2) x^2 - 1
x^2 + x
f(x) = 3secxtanx

f(t) = (cos t sec t)^ 1/2

f(x) = cos^2 x - sin^2 x

f(x) = x 4^x

f(x) = (1/e)^x

f(x) = (e^x^2 + 1)^ 1/3

f(x) = sec (tan e^6x^2)

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Old Post 10-28-2002 02:22 AM
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Crazydeb8ter
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Registered: Apr 2002
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uh i did 4,5 and 7 cause they looked the easiest and i need to finish my own homework

4) [2cosx(-sinx)] - [2sinxcosx]

5) [x(4^x)(ln4)] + (4^x)

7) [1/3((e^x^2)+1)^4/3]*(e^x^2)(lne)(2x)


*got rid of the - exponent in the bracketed area

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Old Post 10-28-2002 04:39 AM
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az0nd2r3
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Registered: Mar 2002
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1:(x^2+2)/(x^2)....if dats wat u wrote....i cant quite tell wat it wuz
2:(3((sin x)^2+1))/(cos x)^3
3:0
6:(-e)^(-x)
8:too lazy to figure out.......

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Old Post 10-29-2002 04:35 PM
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OrangeeeGirL
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my gawd...thanx guyz but the assignment's over so need to reply more..i hate calculus soooo much..i just got a 48 on my quiz today :huh:

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Old Post 10-31-2002 12:52 AM
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az0nd2r3
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ahh.....ish okieeee....i failed mine today......for real....bcuz i didnt kno wtf i wuz doin....

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Old Post 11-02-2002 05:20 AM
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jini
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calc... omgoodness.

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angelicxshield
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holy mutha of ... ... im droppin to calculus regulars when imma senior... and that's onli if i barely manage to pass precalculus in AP/honors... :huh:

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Old Post 11-12-2002 10:04 PM
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Crazydeb8ter
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theres no AP Precal and honors is different than AP

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"The weight of this sad time we must obey,/ Speak what we feel, not what we ought to say./ The oldest hath borne most; we that are young/ Shall never see so much, nor live so long."
King Lear (V.3.300-304)

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Old Post 11-14-2002 04:35 AM
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requiem
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Registered: Nov 2002
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Re: i kno u guyz r smart! so if u help me, i'll luv u forever and ever~~~~~~~~

quote:
Originally posted by OrangeeeGirL
ok..calculus isn't really my subject..so help me out here
if u can answer any of these questions and show work...i'll be so thankful..
try working from the last question and up cuz i think the last ones r the harder ones =.=
ok u have to find derivatives (spelling? dunno)
f(x) = (x+2) x^2 - 1
x^2 + x
f(x) = 3secxtanx

f(t) = (cos t sec t)^ 1/2

f(x) = cos^2 x - sin^2 x

f(x) = x 4^x

f(x) = (1/e)^x

f(x) = (e^x^2 + 1)^ 1/3

f(x) = sec (tan e^6x^2)



I love calc so here goes.
1. can't tell what f(x)=
2. 3((secx)^3 + secx*(tanx)^2)
3. (1/2)(1/(cost sect))(cos t * sec t * tan t - 1)
4. -4sinx * cosx
5. x * 4^x * ln(4) + 4^x
6. (1/e)^x = 1/e^x = e^-x
derivative = -e^-x
7. (1/3)(e^x^2 + 1)(2x*e^x^2)
8. sec(tan e^6x^2) * tan(tan e^6x^2) * (sec(tan e^6x^2))^2 * e^6x^2 * 12x

I'm 99.999% sure these are right but alas, I have no calculator around to check to be absolutely sure.

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Old Post 11-21-2002 09:54 PM
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