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Miss Jones wants to buy at least 10 books. Each paperback book costs an average

Mathematics

1 answer:

puteri [66]2 years ago

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Hello guys not quite sure this

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$y \: = \: f(x) \: = \: 3x \: - \: 2 {x}^{2} \: + \: 5 {x}^{3}$
Here, y is a cubic function of x.
When x = 3,
$y \: = \: f(3) \: = \: 3(3) \: - \: 2 {(3)}^{2} \: + \: 5 {(3)}^{3}$
$y \: = \: 9 \: - \: 18 \: + \: 135$
$y \: = \: f(3) \: = \: 126$
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