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7.1 Van watter twee veranderlikes hang<br />

die grootte van die buite-oppervlakte<br />

af?<br />

7.2 Bewys dat die buite-oppervlakte van<br />

die silinder in die vorm van ‘n funksie<br />

uitgedruk kan word as<br />

2 10<br />

( ) π<br />

A r = r + .<br />

r<br />

7.3 Voltooi die tabel hieronder en gebruik<br />

dit om ‘n netjiese, akkurate grafiek<br />

= +<br />

r<br />

te<br />

skets. Gebruik ‘n skaal van<br />

3 cm = 1eenheid op die x -as en ‘n<br />

2 10<br />

van die funksie A( r) π r<br />

skaal van 1cm = 5 eenhede op die<br />

vertikale as.<br />

95<br />

On which two variables does the<br />

magnitude<br />

depend?<br />

of the surface area<br />

Show that the surface area of the<br />

cylinder may be expressed in the<br />

form of a function as<br />

2 10<br />

( ) π<br />

A r = r + .<br />

r<br />

Complete the table below and use it<br />

to sketch a neat, accurate graph of<br />

= +<br />

r<br />

. Use a<br />

scale of 3cm= 1uniton<br />

the x -axis<br />

2 10<br />

the function A( r) π r<br />

and a scale of 1cm = 5 eenhede on<br />

the vertical axis.

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