Secs.+5.1-5.2+WS

Put ans. here in numerical order. f(x)=ln(cos //V//) =(1/cos//V)*-//sin//V// =**-tan //V//**
 * 1) 1) Worked by Xulia Suero
 * //Correct! Leah//**

//2.// f(x) = cos(lnx) f'(x) = -sin(lnx)(1/x) = -sin(lnx)/ x done by Brooke Wiggins I got the same answer- Checked by Alex Dubois 3. f (x)= x^(1/2) ln(x) y'=d/dx x^(1/2) lnx+ x^(1/2) d/dx (lnx) y'=1/(2x^1/2) ln(x)+x^(1/2)/x Mckenzie Martin y'=(1)(lnx)+(x)(1/x)(1) =lnx+1
 * 1) 5) y=xlnx

y'=lnx+1 y''=(1/x)(1)=1/x

Worked by Kirstyn Smith -Correct! Checked by Sarah Slack

I can't remember if I was supposed to check #3 or #5, but I agree with number 5!
 * 1) 5 checked by Frances Dannenbrink

6. worked by joon baek

7. Worked by Heather Rovner Checked by Brandon Hoffman correct

11. y=sinx^x ln y= x ln sin x u=sin x u'=cos x y'/y= (1)(ln sinx)+(x cos x) y'= (ln sinx+ xcosx)(sinx^x) -Heather Henry

13) [2,4] int(3/x)dx 3int(1/x)dx 3ln(x) [2,4] 3ln4 - 3ln2 2.079

Done by Justin Ivins I agree - checked by Andrew Kim

15.
 * 1) 15 Worked by Emily Johnson



done by rebekah adair I agree! Checked by Kristin Peters