Applications of Integration (VCE SSCE Mathematical Methods): Flashcards

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Applications of Integration
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Formula for avg value of ff on [a,b][a,b]

1baabf(x)dx\frac{1}{b-a}\int_a^b f(x)\,dx

Geometric meaning of average value

Height of rectangle with same area as region under curve

Average value formula interpretation

Area ÷ Width

What integration does with rates of change

Works backwards to find total change

Reciprocal of dTdt\frac{dT}{dt}

dtdT\frac{dt}{dT}

Integrating dtdT\frac{dt}{dT} over temp range gives

Total time for that temperature change

Avg value of f(x)=x2f(x)=x^2 on [0,2][0,2]

43\frac{4}{3}

What rectangle at avg height shares with curve

Same area

Negative signs in rate problems indicate

Decreasing quantities

Integration accumulates

All tiny changes that happen continuously

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