Ex 2: Differentials: Determine dy given x and dx

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This video provides an example of how to determine differential y (dy) given a specific value of x and dx.
  1. Mathispower4u
  2. differentials
  3. dy
  4. dx
  5. value
  6. determine
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I know this is an older video, but just wanted to comment and let you know you did a great job and really explained this topic very well!

SuckyAndWeKnowIt
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This was awesome! Thank you for this helpful video!

loganevans
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Wait, so would that technically mean if I were to have dy/dx, I would isolate dy by just multiplying by dx to dy/dx which would also multiply the function by dx?

gidodyas
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Im doing practice problems off kuta software and one problem says y = x^3 - 2 and apparently the answer is ∆y = −3x^2(∆x) − 3x(∆x)^2 − (∆x)^3. why? Also wasnt given any dx or dy or x values. Just the y = x^3 - 2 part.

pianolearnen
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Even though you approximate delta y you could be way off if you did other points.

MagnusTheGreat
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This has really helped me in AP calc. Thank you for posting this! You’re the only account I’ve seen post this content so I’m so glad I found this video

elizabeths
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How do I do this if not given a value for dx?

The question is simply: "Find the differential dy of the function y=2x^(3/8)"

I got dy/dx = (3)/(4x^5/8), or dy = 3/(4x^5/8) * dx, not sure if this is an acceptable answer..

LittledudeJrr
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9 years ago and you are still helping students like me, thank you so much for this!💕

itslildil