If f(x)=3x+2, then f(2a+b)=?

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justaguide's profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

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The function f(x)=3x+2.

To find f(2a+b), substitute x with 2a + b

f(2a + b) = 3(2a + b) + 2

=> 6a + 3b + 2

The required value of f(2a + b) = 6a + 3b + 2

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giorgiana1976 | College Teacher | (Level 3) Valedictorian

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To determine the value of the fuction f, at the point x = 2a + b, we'll have to replace x by the expression 2a+b:

f(2a+b) = 3*(2a+b) + 2

We'll remove the brackets:

f(2a+b) = 6a + 3b + 2

The requested value of the function at the point x = 2a + b is f(2a+b) = 6a + 3b + 2.

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