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Answer :
Final answer:
To find f(4) for the function f(x) = 3^x, we substitute x = 4 and calculate 3^4 = 81. Therefore, option A. 81 is the correct answer.
Explanation:
In this question, we are asked to find f(4) where the function f(x) is given by f(x) = 3^x. This is a mathematical function where x is the exponent of the base, in this case 3. To find f(4) we substitute x = 4 in the equation, thus we have f(4) = 3^4.
Calculating 3^4, which means multiply 3 by itself 4 times (3*3*3*3), yields 81. From the given choices, option A. 81 is therefore the correct answer to the problem of finding the value of the function f(4) in the equation f(x) = 3^x.
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Answer:
A. 81
Step-by-step explanation:
f(4) = f(x) = 3^x
f(4) = f(4) = 3^4
f(4) = f(4) = 3 * 3 * 3 * 3
f(4) = f(4) = 81
