evil Flashcards

(23 cards)

1
Q

how do you find dy/dx implicit differentiation

A

whatever exponent is on the top, replace with dy/dx
find the derivative
solve for dy/dx

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2
Q

Find dy or dx /dt given the opposite and a point

A

find the derivative and multiply by d/dt
solve for the thing you’re trying to solve for
plug in numbers

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3
Q

volume of a sphere problems

A

find the derivative of volume and multiply it by dr/dt
plug in known values

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4
Q

chain rule

A

derivative of outside of function (leave inside alone) * derivative of inside of function

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5
Q

when do you use the chain rule?

A

when you have a function inside and something outside
ex. sin 3x-> yes
sinx-> no

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6
Q

when do you use the chain rule more than once?

A

when you use the chain rule and there are 2 or more functions left, usually with more than x

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7
Q

chain rule with a square root

A

convert to an exponent
rewrite as 1/2√(x)^-1/2 x’
write as y= x’/2√x
ex. √3x^2 -> 6x/2
√3x^2+1

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8
Q

How do you find a derivative when given a rule and a list of values

A

Identify the rule
Plug in the given numbers for the regular and derivative as necessary
Simplify

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9
Q

implicit differentiation

A

take the derivative of both sides for x
x is regular derivative
multiply y by dy/dx
solve for dy/dx

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10
Q

do you have to use the product rule?

A

YESSSSSSSSSSSS

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11
Q

2nd implicit differentiation

A

take the derivative again
take y out and find the derivative + multiply by dy/dx
plug back in * multiply by dy/dx
plug in original dy/dx

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12
Q

d/dx sin⁻¹

A

1/√1-x²

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13
Q

d/dx tan⁻¹

A

1/x²+1

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14
Q

d/dx sec⁻¹

A

1/|x|*√x²-1

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15
Q

d/dx cos⁻¹

A

-1/√1-x²

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16
Q

d/dx cot⁻¹

17
Q

d/dx csc⁻¹

A

-1/|x|√x²-1

18
Q

d/dx e^x

19
Q

d/dx A^x

20
Q

d/dx |x|

21
Q

d/dx lnx

22
Q

d/dx logAx