Hey there! can you me posted picture of question

For this case we have the following function:
 f (x) = 3 ^ x
 We must replace the value of x = 4 in the function.
 We have then:
 f (4) = 3 ^ 4
 Rewriting we have:
 f (4) = 81
 
 The function evaluated at x = 4 is equal to:
 f (4) = 81
 option D

Iwish i knew the answer but i don’t but someone will come and us

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