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If 
f(x)=(-3)/(-20+sqrtx), what is the value of 
f(3), to the nearest tenth (if necessary)?
Answer:

If f(x)=320+x f(x)=\frac{-3}{-20+\sqrt{x}} , what is the value of f(3) f(3) , to the nearest tenth (if necessary)?\newlineAnswer:

Full solution

Q. If f(x)=320+x f(x)=\frac{-3}{-20+\sqrt{x}} , what is the value of f(3) f(3) , to the nearest tenth (if necessary)?\newlineAnswer:
  1. Substitute xx with 33: To find the value of f(3)f(3), we need to substitute xx with 33 in the function f(x)=320+xf(x) = \frac{-3}{-20+\sqrt{x}}.\newlineSo, f(3)=320+3f(3) = \frac{-3}{-20+\sqrt{3}}.
  2. Calculate square root of 33: First, calculate the square root of 33. 3\sqrt{3} is approximately 1.7321.732.
  3. Substitute 3\sqrt{3}: Now, substitute 3\sqrt{3} into the function.f(3)=320+1.732.f(3) = \frac{-3}{-20+1.732}.
  4. Perform addition inside parentheses: Next, perform the addition inside the parentheses. 20+1.732=18.268-20 + 1.732 = -18.268.
  5. Divide 3-3 by 18.268-18.268: Now, divide 3-3 by 18.268-18.268.f(3)=318.268=318.268.f(3) = \frac{-3}{-18.268} = \frac{3}{18.268}.
  6. Simplify fraction and round: Finally, we simplify the fraction and, if necessary, round to the nearest tenth. \newline318.268\frac{3}{18.268} is approximately 0.1640.164 to three decimal places. \newlineRounded to the nearest tenth, this is 0.20.2.

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