J jyu Member Joined Nov 14, 2005 Messages 623 Gender Male HSC 2006 Jan 23, 2011 #1 Last edited: Jan 23, 2011
B Bored Of Fail 2 Banned Joined Jan 13, 2011 Messages 354 Gender Male HSC N/A Jan 23, 2011 #2 yeh for x<0 , |x| = -x therefore f(x) = ln(x^2) / -x f(x) = - ln (x^2) / x u= ln(x^2) du/dx= 2/x v= x dv/dx= 1 f ' (x) = - [ ( 2 - ln(x^2) ) ] / ( x^2 ) sub x=-e into that
yeh for x<0 , |x| = -x therefore f(x) = ln(x^2) / -x f(x) = - ln (x^2) / x u= ln(x^2) du/dx= 2/x v= x dv/dx= 1 f ' (x) = - [ ( 2 - ln(x^2) ) ] / ( x^2 ) sub x=-e into that
B Bored Of Fail 2 Banned Joined Jan 13, 2011 Messages 354 Gender Male HSC N/A Jan 23, 2011 #3 similarly , between the limits of -1 and -e , |x| = -x therefore we want to integrate - [ln(x^2) / x] dx then sub u= ln(x^2) du/dx= 2/x so dx= x du/ 2 so we want to integrate -u/2 du , and remember to change the limits of the integral Last edited: Jan 23, 2011
similarly , between the limits of -1 and -e , |x| = -x therefore we want to integrate - [ln(x^2) / x] dx then sub u= ln(x^2) du/dx= 2/x so dx= x du/ 2 so we want to integrate -u/2 du , and remember to change the limits of the integral
J jyu Member Joined Nov 14, 2005 Messages 623 Gender Male HSC 2006 Jan 23, 2011 #5 i was practising latex
slyhunter Retired Joined May 17, 2009 Messages 6,803 Gender Male HSC 2011 Jan 25, 2011 #7 braintic said: How do you type in these equations? I looked, but I couldn't find an equation option anywhere. Click to expand... Latex.
braintic said: How do you type in these equations? I looked, but I couldn't find an equation option anywhere. Click to expand... Latex.