13 items are filed under this topic.
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Heat equation |
2017-11-23 |
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From Max: What does du\dt=a(triangle)^2u mean. Can it be solved for t. Answered by Penny Nom. |
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Differentiate ln[x(2x-4)^1/2] |
2014-06-28 |
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From Igwe: If y=In[x(2x-4)^1/2],find dy/dx at x=3 Answered by Penny Nom. |
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Differentiation rules |
2012-10-23 |
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From Morgan: Use the derivative rules to differentiate each of the following:
1. f(x)=1/x-1 2. f(x)= sqrt(x) Answered by Penny Nom. |
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Partial derivatives |
2009-01-17 |
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From Meghan: I have a question I've been working at for a while with maxima/minima of partial derivatives.
"Postal rules require that the length + girth of a package (dimensions x, y, l) cannot exceed 84 inches in order to be mailed.
Find the dimensions of the rectangular package of greatest volume that can be mailed.
(84 = length + girth = l + 2x + 2y)" Answered by Harley Weston. |
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Implicit Derivatives |
2007-07-13 |
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From Charles: I need help computing y' by implicit differentiation the question is:
y^2 + x/y + 4x^2 - 3 Answered by Stephen La Rocque. |
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Log base 2 of log base 2 of x |
2007-06-27 |
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From alex: y = log base 2 of lag base 2 of x
The slope of the tangent to the given curve at its x-intercept is..? Answered by Harley Weston. |
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The third derivative |
2004-10-15 |
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From Holly: Why would you ever take the third derivative? Answered by Harley Weston. |
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Differentiation |
2004-08-04 |
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From A parent: I am a parent trying to understand higher level of maths and would be very grateful if you could help with differentiating the following functions, identifying general rules of calculus:
a) f(x)=e^2^xIn(cos(8x))
b) f(x)=secx/SQRTx^4+1 Answered by Penny Nom. |
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Areas, perimeters and derivatives |
2004-02-15 |
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From Geoff: A recent lecture in my calculus class led me to realize that the derivative of the area of a circle, with respect to the radius is equal to the circumfrence. This also holds true for the relationship between the volume of a sphere and the surface area of that sphere:
why do these hold true? why is it only for circular objects? Answered by Harley Weston. |
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Functions, graphs and derivatives |
2003-10-05 |
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From Jathiyah: I wanted to know how would you tell (on a graph diplaying two funtions), which funtion is the derivative of the other? Answered by Walter Whiteley. |
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Derivatives, there must be an easier way |
2000-09-06 |
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From Brad Goorman: The direction read: Take the derivative of each expression. y = {1+[x+(x2 +x3)4]5}6
Answered by Harley Weston. |
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Mathematical Induction and the Derivative |
1997-03-18 |
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From Shuling Chong: "Obtain a formula for the nth derivative of the product of two functions, and prove the formula by induction on n." Any educated tries are appreciated. Answered by Penny Nom. |
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Derivées partielle |
1999-10-19 |
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From Arnaud Flandin: Quel est la definition des derivées partielle Answered by Claude Tardif. |
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