Question

the derivative of 6t^-3 would be 0 because i got 0 but i plug it in my online hw and says it's incorrect

Answer 1

is this for the hw due tonight? hah

Answer 2

smh yea man it is and i have like 3 problems left to do?

Answer 3

I have like 7, and 40 mins to finish it. What problem are you on?

Answer 4

i have problem 6, 14 , 17 , and 19 to do.

Answer 5

and the derivative is -18/(t^4) if you wrote that function down correctly

Answer 6

it is how does the power keep going down for the negative ones?

Answer 7

I'd explain if I wasn't pressed for time. Just plug it in and get it over with for now.

Answer 8

hahah aiight man i just did, it worked thanks man.
ima let you get back and finish before time is up

Answer 9

for problem 2 and those alike, how do you find f '(3) or whatever it's asking?

Answer 10

plug in the derivative equation you got into the calculator and look for the f ' of 3 and that should be your answer

Answer 11

still lost. my f(x) is 5+3/x+4/x^2. the f'(x) is -((3x+8)/(x^3)). it's asking for f '(3)

Answer 12

plug in the f'(x) is -((3x+8)/(x^3)) into the calculator and go to table and look what f'(3) is, that should be your answer.

Answer 13

i'm retarded, I had my symbols messed up :/ worked, thanks

Answer 14

haha its all good man, it happened to me with switching pos. and neg.
no problem

Answer 15

have you worked out problem 14 yet, its confusing?

Answer 16

yeah, what's your f(x)?

Answer 17

and what values is it asking for?

Answer 18

and how did you do problem 8?

Answer 19

its f(x)= 5/5sqrt(X)

Answer 20

5*sqrt(x) or x^(1/5)?

Answer 21

the 2nd one, i didnt know how to write it out

Answer 22

is it asking for f '(1) and f '(5)?

Answer 23

yea its asking for both of them

Answer 24

-1 and -.145 respectively

Answer 25

thanks. man

Answer 26

for problem 8 you have to find the derivative and then put the derivative into the calulator and find x where y is 0.

Answer 27

there should be two solutions

Answer 28

my derivative is 30x^2+90x-12. can't find them

Answer 29

hold on

Answer 30

no wait. 30x^2+90x-120

Answer 31

nvm, got it.

Answer 32

the answer should be -4 and 1.

Answer 33

are you done? I need just need to get 19 and the last part for 16.

Answer 34

naw i need to do 17 and 19 too.

Answer 35

v=s'=4t^3-3t^2
a=12t^2-6t=0
2t^2-t=0
t(2t-1)=0
t=0 or t=1/2

was what I was given for 17. your equation might be different though

Answer 36

for the last part of 16 the answer for M: would be the same as the derivative of f'(4)

and to get B you have to use the formula y-y1=m(x-x1) which will give you the whole equation in y=mx+b form

Answer 37

i mean whatever derivative you got

Answer 38

i'll do your 17 if you do my 16.

Answer 39

my f(x) = 4x+2/x. f '(5) = (4x^2-2)/x^2 => 3.92, which was also m. I just need b

Answer 40

A particle moves along a straight line with equation of motion s=t^3-3t^2.

Answer 41

try 1.

Answer 42

your first derivative is 3t^2-6t, and your second is 6t-6 =>

6t-6=0
6t=6
t=6/6

Answer 43

m: 3.92

b: .8

Answer 44

.8 worked, cheers.

Answer 45

y-y1=m(x-x1)
y-20.4=3.92(x-5)
y-20.4=3.92x-19.6
y=3.92x+.8

Answer 46

1 worked tooooo man finally done thanks a lot man!!

Answer 47

did you get 19? I have 7 mins to finish that pelletttt

Answer 48

mine's find d^2*y/dx^2 for y=-5x^4+4x

Answer 49

naw man thats the only one im having trouble on...i think you should ask someone!?!

Answer 50

i did, like 10 times but no one has answered so far

Answer 51

what should we do..i think the professor will open it 2morrow if we ask him cause he has done tht for all the other ones

we can ask him to work tht problem

Answer 52

http://uk.answers.yahoo.com/question/index?qid=20110206082958AAFXkaF

Answer 53

it has the step by step?

Answer 54

it's not the same as our though

Answer 55

yea i think we can work with it, doesn't seem to have a lot of steps

Answer 56

2 mins, good luck

Answer 57

haha ima put it into wolf ram alpha nd get the answer

Answer 58

i got it
what's your eq?

Answer 59

mine is y=-8x^4+4x

Answer 60

-96x^2

Answer 61

got it right and im done!!!!

Answer 62

lol same, what a pain... who are you, by the way?

Answer 63

gabriel the dude with the snapback, umm we stayed after school with the other guy to finish hw

Answer 64

oh right, I told you about this site. lol if we're relying on this for our hw then we're gonna mess up on that test big time

Answer 65

hahaha..yea i try only to ask 3 questions or fewer....the others i had to look at youtube videos and they really helped

Answer 66

we have review all class 2morrow so we gonna be set

Answer 67

yeah, but with summer who has time to be actually studying and pellet? did you get the book?

Answer 68

i know i be tired after tht 3 hour lecture man
its coming on wednesday..bout to be in it for help and understanding

Answer 69

hope it helps you man. Aight, I'm gonna go shower and pass out. see you in class

Answer 70

aiight man see man