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18 votes
Given f (x) = 3x+4, find f (2)

User Firkamon
by
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2 Answers

12 votes

Step-by-step explanation

  • Given the equation.


f(x) = 3x + 4

  • Find f(2) by substituting x = 2 in the equation.


f(2) = 3(2) + 4 \\ f(2) = 6 + 4 \\ f(2) = 10

Therefore the value of f(2) is 10.

  • Meaning of f(a) and substitution in function

f(a) means the value of f(x) is ... at x = a. Same goes to the f(2) = 10. It means the value of f(x) = 10 at x = 2.

Answer


f(2) = 10

User Angad Bansode
by
8.6k points
4 votes

f(x) = 4x + 4 means that if we put an x into our function, a 3x + 4 come out.

So in this problem, we're putting a 2 into our function which

means that a 3(2) + 1 comes out which simplifies to 6 + 1 or 7.

So f(2) = 7 or the value of the function at 2 equals 7.

User Dschulten
by
8.4k points

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