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Use the following function rule to find f(121)f(121).\newlinef(x)=9xf(x) = 9\sqrt{x}\newlinef(121)=f(121) = _____

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Full solution

Q. Use the following function rule to find f(121)f(121).\newlinef(x)=9xf(x) = 9\sqrt{x}\newlinef(121)=f(121) = _____
  1. Identify Function and Input: Identify the function and the input value.\newlineWe are given the function f(x)=9xf(x) = 9\sqrt{x} and we need to find the value of f(121)f(121).
  2. Substitute Input into Function: Substitute the input value into the function. f(121)=9121f(121) = 9\sqrt{121}
  3. Calculate Square Root: Calculate the square root of the input value. 121=11\sqrt{121} = 11, because 11×11=12111 \times 11 = 121.
  4. Multiply by Coefficient: Multiply the result from Step 33 by the coefficient in the function.\newlinef(121)=9×11f(121) = 9 \times 11
  5. Perform Final Multiplication: Perform the multiplication to find the final answer. f(121)=99f(121) = 99

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