rebecca1233
What is the value of f[g(3)] for the functions f(x) = x + 2 and g(x) = 5x - 1? (Type only the value of your final answer, no variables.)
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febylailani
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f(g(3)) first, find g(3) . after that, put the result tumber on the formula. like this >> f(result g(3)) do u understand?
rebecca1233
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not really.. can u help me work through this
febylailani
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ok.. first.. find g(3) with this formula g(x) = 5x - 1
rebecca1233
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soo what do i do now..
febylailani
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find the result of g(3) just subtitute the x on this formula >> g(x) = 5x - 1 with 3. what is the result u got?
rebecca1233
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so substitute with x with 3
febylailani
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yup.
rebecca1233
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g(3) = 5(3) - 1
febylailani
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yup..
rebecca1233
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so 14 is the answer ?
febylailani
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it's the answer for g(3).
now.. subtitute x with 14 to this formula f(x) = x + 2
rebecca1233
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14+2 = 16
rebecca1233
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so what now
febylailani
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it's the final result
rebecca1233
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so 16 is the answer not 14
rebecca1233
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can u please help me with a different question
febylailani
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f[g(3)] is
f(g(3)) = g(3) + 2
1) to solve that first we must find g(3).
g(3) = 5(3) - 1
g(3) = 15 - 1 = 14
2) after that, we can find f(g(3)).
f(g(3)) = g(3) + 2
f(14) = 14 +2
f(14) = 16
do u understand?