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Find f(5x) .The function f is defined by f(x) = 2x ^ 2 - 4 .

Find F5x The Function F Is Defined By Fx 2x 2 4 class=

Sagot :

Solution:

Given:

[tex]f(x)=2x^2-4[/tex]

To find f(5x), this means the value of f(x) when x = 5x

Hence,

[tex]\begin{gathered} f(x)=2x^2-4 \\ f(5x)=2(5x)^2-4 \\ f(5x)=2(25x^2)-4 \\ f(5x)=50x^2-4 \end{gathered}[/tex]

Therefore,

[tex]f(5x)=50x^{2}-4[/tex]

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