Calculus

Itsbackfliptime

Itsbackfliptime

Active member
The area of a rectangle with dimensions x and y is A(xy)=xy. Find the differential of this function.

dA= y dx + x dy

If you measure x=8 and y=6, with a measurement error of +/- 0.47, use the differential to estimate the possible error in the caculated area. (Assume that all expressions are in cm. Do not include units in your answer.)

possible error =

anyone know calc III?
 
Haha, that totally sounds like, "hey I know of a calculus term, and this is where I get to use it, Just Integrate!"
 
damnit wheres my TI-83 so i can do math

i dont see where you even need to use calculus, you just find the area of a rectangle with measurements of 8.47 x 6.47 and subtract the area of the original rectangle (48) from it. then you do the same thing but with a rectangle that is 7.53 x 5.53 and add the two differences.

the top equation just describes product rule for when you take the derivative of a polynomial function.
 
haha whoa i just started calculus, we've just hit the 'anx^n-1' bullshit to find the equation for the gradient of a function
 
cant help ya man im re-taking calc 2 ugh. just wondering is that for multivariable or differential equations? i gotta take both next semester, oh joy... unless i drop engineering altogether which i may just do.
 
On AP tests if there are multiple parts you and let's say you need the answer for part B to answer part C, you can just make up a number for part B and use it for part C and then still get full credit for part C. At least that's how it works on the physics exam.
 
you have to solve it using integration. I remember doing this im pretty sure you have to use an equation or maby you just use the da as the error I dont know look in your calc book.
 
so i was right?

um im halfway through a ap calc highschool class. and if thats calc three, you have easy stuff, or im not getting something.
 
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