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19 February, 09:52

let f (x) = 2/5x^2 - 2. the function g (x) is a vertical stretch of f (x) by a factor of 2 what is the equation of g (x) ?

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  1. 19 February, 11:47
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    g (x) = 4/5 x² - 4

    Step-by-step explanation:

    ∵ f (x) = 2/5 x² - 2

    ∵ f (x) stretched vertically by scale factor 2

    ∴ g (x) = 2[f (x) ]

    ∴ g (x) = 2[2/5 x² - 2] = 4/5 x² - 4
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