Posted by **jerson** on Sunday, September 14, 2008 at 9:55am.

let f(x) =4x^4-6 evaluate f(3)

- trig -
**drwls**, Sunday, September 14, 2008 at 10:23am
Raise 3 to the fourth power (giving you 81), multiply the result by 4, and subtract 6 from the result.

Surely you can do that on your own.

- trig -
**Reiny**, Sunday, September 14, 2008 at 10:26am
you should be familiar with the terminology of this topic

if f(x) = 4x^4 - 6

f(3) = 4(3^4) - 6

= 4(81) - 6

= 324-6

= 318 , (simply replace the x with 3 in the expression)

BTW, why did you label this question under the topic of "trig" ???

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