Questions about ln

can someone give me an answers for my questions?
Those are true or false? (x ln x)’ = ln x +x; (ln (x2 +2))’ = 2x/x2;
Catégorie : Yahoo!7 Answers
Par : Emica J

Please help with Solving for x?
a) e^2x - 5e^x + 6 = 0 b) 6^3x-8 + 10 = 45 c) e^ln(9x)+1 = 8 (Self study guide not homework)
Catégorie : Mathematics
Par : diana1@y7mail.com

Please help with proving these Identities ?
a) 1/cosx - cosx = sinxtanx b) sec^2x - tan^2x / 2sin^2x + 2cos^2x = 1/2 c) sinxcosxtanx = 1-cos^2x SOLVE FOR X a) sinx + (sqroot)2 = -sinx b) cotxcos^2x = 2cotx c) 2sin^2x - sinx - 1 = 0 d) 1+sinx / cosx + cosx / 1+sinx = 4 e) e^2x - 5e^x + 6 = 0 f) 6^3x-8 + 10 = 45 g) e^ln(9x)+1 = 8 Please Help with whatever you can!!!
Catégorie : Mathematics
Par : diana1@y7mail.com

Integration help 1/x^2 please?
Integrating 1/x^2 gives x^(-2) and -(x^(-1)) or -1/x But if you use the fact that integrating 1/t gives ln (absolute value of t)...then you get (ln(absolute value of (x^2)))/2x. Are both of these the same thing or am I missing something? Edit: one answer suggested that the lnx only works for y'/y...my question then is: Can't you adjust (i.e. int(1/3x) becomes 1/3ln3x)?
Catégorie : Mathematics
Par : Akshat S

Caclulus AB problem (1993)?
Let f be the function defined by f(x) = ln(2 + sinx) for [pie, 2pie] a. Find the absolute maximum value and the absolute minimum value of f. b. Find the x=coordinate of each inflection point on the graph of f.
Catégorie : Mathematics
Par : shamalong680

Integration problem help?
I have ln(x+1/e) / (x+1/e) I'm thinking of integrating by parts. Letting x+1/e equal to z and doing ln(z)/z but I get stuck on integrating. Any help please?
Catégorie : Mathematics
Par : Mr. Cloud

derivative of (1+x)^2x ?
i got (1+x)^2x (2/1+x) and then i got (1+x)^2x ln(1+x) and maple give me something totaly different. help ?
Catégorie : Mathematics
Par : Sealion

derivatives of log problems?
can someone show me how to take the derivative of y=ln(lnx)?
Catégorie : Mathematics
Par : wzp

MATH EXPERTS PLEASE HELP ME WITH THIS...!?
It says to express each "y" as a function of "x". The conctant C is a positive number. 1) ln(y) = 3x + ln(C) 2) 3 ln(y) = (1/2)ln(2x+1)- (1/3)ln(x+4) + ln(C)
Catégorie : Mathematics
Par : Gerry A

Differentiation Problem?
Could someone please solve this problem for me. I am aware that the quotient rule applies. Thanks! y= ln(x/(x^2+1))
Catégorie : Mathematics
Par : Mike

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