What is the <strong>MINIMUM</strong> value of the function f(x)=\log_{10}(x^{2}+2x+11)?
- A. 0
- B. 1 ✓
- C. 2
- D. 10
Correct Answer: B. 1
Explanation
Complete the square for the quadratic expression: x^2 + 2x + 11 = (x+1)^2 + 10. The minimum value of (x+1)^2 is 0, which occurs at x = -1. Therefore, the minimum value of the expression inside the logarithm is 10. The minimum value of the function is f(-1) = \log_{10}(10) = 1.
Related questions on Calculus
- Let z=[y] and y=[x]-x, where [.] is the greatest integer function. If x is <strong>NOT</strong> an integer but positive, then what i...
- If f(x)=4x+1 and g(x)=kx+2 such that fog(x)=gof(x), then what is the value of k?
- What is \int(x^{x})^{2}(1+\ln x)\,dx equal to ?
- What is \int e^{x}\{1+\ln x+x\ln x\}\,dx equal to?
- What is \int\frac{(\cos x)^{1.5}-(\sin x)^{1.5}}{\sqrt{\sin x\cdot \cos x}}\,dx equal to ?