derivatives

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27 Terms

1
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t/f: if a function is differentiable then it is continuous

true

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t/f: if continuous then differentiable

false

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t/f: if a function is NOT continuous then NOT differentiable

True

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t/f: if NOT differentiable then NOT continuous

false

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what graphical features make a function not differentiable

a cusp/sharp corner, a discontinuity, vertical tangent (steep downward hill)

6
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d/dx(sinx)

cosx

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d/dx(cosx)

-sinx

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d/dx(tanx)

sec²x

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d/dx(cotx)

-csc²x

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d/dx(secx)

(secx)(tanx)

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d/dx(cscx)

-csc(x)cot(x)

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d/dx sqrt(x)

1/2sqrt(x)

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d/dx e^x

e^x

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d/dx lnx

1/x

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d/dx b^x

(b^x)(lnb)

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d/dx logb(x)

1/(x)(lnb)

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AROC equation

y2-y1/x2-x1

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definition of a derivative at a point

f’(c)=limx→c f(x)-f(c)/x-c

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definition of a derivative as a function

f’(x)= lim h→0 f(x+h)-f(x)/h

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power rule definition if f(x)=ax^n

f’(x)=(n•a)x^n-1

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power rule example: 3xÂł

9x²

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product rule definition if h(x)=f(x)•g(x)

h’(x)=f’(x)•g(x)+f(x)•g’(x)

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product rule example (3x²)(sinx)

6x•sinx+3x²•cosx

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quotient rule if h(x)=f(x)/g(x)

h’(x)=f’(x)•g(x)-f(x)•g’(x)/g(x)²

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chain rule definition if h(x)=f(g(x))

h’(x)=f’(g(x))•g’(x)

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chain rule example: sin²x

2(sinx)•cosx

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quotient rule example x²/5x

2x•5x-x²•5/5x²