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18-06-2020
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The function f is defined by f(x)=2x² -1.
Find f(2x).

Respuesta :

Hrishii Hrishii

18-06-2020

Answer:

[tex] 8x^{2} - 1[/tex]

Explanation:

[tex]f(x) = 2 {x}^{2} - 1 \\ plug \: x = 2x \\ f(2x) = 2 {(2x)}^{2} - 1 \\ f(2x) = 2 \times 4x^{2} - 1 \\ f(2x) = 8x^{2} - 1 \\ [/tex]

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