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 3 years ago
Need help with the final step:: Let the function f(x) be defined by the equation y = f(x), where x and f(x) are real numbers.
f(x) = 4 − x^2
f(9) = 77
f(7) = 45
f(k) = 4k^2
f(k2 − 8) = ??
 3 years ago
Need help with the final step:: Let the function f(x) be defined by the equation y = f(x), where x and f(x) are real numbers. f(x) = 4 − x^2 f(9) = 77 f(7) = 45 f(k) = 4k^2 f(k2 − 8) = ??

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3pwood
 3 years ago
Best ResponseYou've already chosen the best response.0Basically you just plug in the entire input expression in place of the x so f(k2  8) = 4  (k2  8)^2

mathater
 3 years ago
Best ResponseYou've already chosen the best response.0suppose to have read as f(k^28)=

3pwood
 3 years ago
Best ResponseYou've already chosen the best response.0Still valid if you read the answer the same way. =) f(k^2  8) = 4  (k^2  8)^2
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