2010 · Q18
If r and s are any real numbers such that 0 ≤ s ≤ 1 and r + s = 1, then what is the maximum value of the product rs ?
Elementary MathematicsAlgebra
- A1
- B¾
- C½
- D¼
Explanation
rs=s(1-s) is maximum 1/4 at s=1/2.
If r and s are any real numbers such that 0 ≤ s ≤ 1 and r + s = 1, then what is the maximum value of the product rs ?
Explanation
rs=s(1-s) is maximum 1/4 at s=1/2.