Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:18pm On Aug 13, 2014 |
benbuks: guys ..i made mistake in that abelian question
seems d.done was right!! i make corrections later ..... We should overlook this now, it's been fun solving calculus with great minds here and also learning at the same time. Big congrats to the winner (Drniyi4u) and all the other participants. Thanks to you, benbuks, as well for the time you've put into this. |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 10:11pm On Aug 12, 2014 |
benbuks: fastest fingers first
compute
lim as n--> infinity
of [5 (n+1) + 7(n+1) / (5n - 7n ]
correct answer only .... -7 |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:41pm On Aug 12, 2014 |
benbuks: ok
i give you 10mins ....if no1 gets it
then i post another question.
a winner must emerge ....
|
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:08pm On Aug 12, 2014 |
benbuks: Q1..
given xy=yx
prove that
y' =(y/x)[(xlny-y) /(ylnx-x) ]
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Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:36pm On Aug 12, 2014 |
benbuks: integrate xe2x dx
asap..
(xe^2x)/2 - (e^2x)/4
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Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:32pm On Aug 12, 2014 |
benbuks:
it invites the use of partial fractions not. . trig. -arctanh x can be proven to be equal to the natural log answer too |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:29pm On Aug 12, 2014 |
benbuks: DRNIYI4U.--------------2PTS
KENDYZMA-------------2PTS Pls why is my answer wrong? |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:15pm On Aug 12, 2014 |
benbuks: Q4 $dx/(x^2 -1) -arctanh x + c |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:09pm On Aug 12, 2014 |
benbuks: Q4 f the rate at which EVD spreads in west Africa is given by the function f(t)=-ekt . compute f " (100) . (-k^2)* e^(100K) |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:02pm On Aug 12, 2014 |
benbuks: Q5 . integral of tanx.sec2x dx is.....? (sec^2 x)/2 + c |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 7:54pm On Aug 12, 2014 |
benbuks: Q6 if f(x,y)= y3 +2yx2 -3x -3
Fxy =………? (3y^2 + 2x^2)(dy/dx) + (4xy-3)= dy/dx |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 7:47pm On Aug 12, 2014 |
benbuks: Q.7 .$[-3tan(3p)sec(3p)]dp -sec 3p + c |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 7:42pm On Aug 12, 2014 |
benbuks: Q8. Y=arc.sinh(8x)
y ' = ? . 8/sqrt(64x^2 +1) |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 6:11am On Aug 12, 2014 |
benbuks: Oya guys...fix a time you all will be available ተoday
asap ... 7:30pm |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 11:33pm On Aug 11, 2014 |
I have to quit at this point, nice dusting up calculus with you guys again. |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 11:29pm On Aug 11, 2014 |
benbuks: $dx/(1+x2 ) for -infinity <x< infinity
=?. 2arctan(infinity)....(looks weird) |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 11:20pm On Aug 11, 2014 |
benbuks: Q d/dx arc.cosh(e2x) = …? (2e^(2x))/sqrt((e^2x)^2-1) |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 11:15pm On Aug 11, 2014 |
benbuks: Q what is d derivative of y=arc tan (x^2 - 1) 2x/((x^2-1)^2 + 1) |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 11:06pm On Aug 11, 2014 |
benbuks: Q $ e√x dx No idea |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 11:02pm On Aug 11, 2014 |
benbuks: Q.y= cos2x
y ' ' =…? -2COS2X |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 10:56pm On Aug 11, 2014 |
benbuks: Q. y= earctanx
y ' =…? e^arctanx/(x^2 + 1) |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:52pm On Aug 11, 2014 |
benbuks: Q14. integral of tan2x dx =…?
S. secx+ c
e. cotx + c
u. tanx -x+c
n . -tanx-x+c U |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:43pm On Aug 11, 2014 |
benbuks: Q15
2x2 /y =1/x .y '
solve
E. -y=x2 - c
B. y=x2 + c
O. -x2 +c = y
L. -x+c=y
A.God forbid ... y^2 = x^4 + C |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:33pm On Aug 11, 2014 |
benbuks: Q13 solve
4x4/x = dy/dx
M. x4 + c=y
A.dxx4 + c =y
T.x3 -c =y
H .. hmm ..na wa ooo M |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:22pm On Aug 11, 2014 |
benbuks: Q12. solve
0=sinx + y '
B. cosx+c
u.sinx + c
k. -sinx + c
s. -cosx + c B |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:15pm On Aug 11, 2014 |
benbuks: OK GUYS G GUYS..
RELAX........ My bad, got the question wrong |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:14pm On Aug 11, 2014 |
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Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:07pm On Aug 11, 2014 |
benbuks: Q2 . $lnxdx =.? 1/x + c; c= constant of integration |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 9:06pm On Aug 11, 2014 |
benbuks: Q1 if y =-4e-4x
it fourth derivative is ...?
B -1024e-4x
E. 1024e4x
N. - next question please.
B |
Education / Re: Calculus Mental Challenge (CMC) WINNER ::::::::::::DRNIYI4U:::::::::: by ddone: 8:37pm On Aug 11, 2014 |
benbuks: TIME UP...!! Hope you got my response? |
Literature / Re: Unwanted- Safarigirl by ddone: 4:36pm On Jul 06, 2014 |
Sorry for the late reply[/quote] Safarigirl, great job you're doing here and on "Getting a life" too. More updates please ![smiley](https://www.nairaland.com/faces/smiley.png) |
Romance / Re: Miss Nairaland June 2013 is LUPEY by ddone: 8:55pm On Jun 07, 2013 |
I vote for Lupey 1 Like |