Miscellaneous Exercises (VCE SSCE Mathematical Methods): Flashcards

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Miscellaneous exercises
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Technique to solve hard integrals using differentiation

Recognise derivative patterns and work backwards

Derivative of loge(x2+1)\log_e(x^2 + 1)

2xx2+1\frac{2x}{x^2 + 1}

Derivative of cosxsinx\frac{\cos x}{\sin x}

1sin2x\frac{-1}{\sin^2 x}

Value of cos(π4)\cos(\frac{\pi}{4}) and sin(π4)\sin(\frac{\pi}{4})

Both equal 22\frac{\sqrt{2}}{2}

loge(kx)dx\int \log_e(kx) dx

xloge(kx)x+cx \log_e(kx) - x + c

xloge(kx)dx\int x \log_e(kx) dx

12x2loge(kx)x24+c\frac{1}{2}x^2 \log_e(kx) - \frac{x^2}{4} + c

Example of function with no elementary antiderivative

ex2e^{-x^2}

When to use CAS for integrals

Complex expressions, verification, non-elementary functions

Differentiation rule used with f(x)=xloge(kx)f(x) = x \log_e(kx)

Product rule

How to verify integration result

Differentiate the result to check it matches the integrand

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