WAEC - Further Mathematics (2020 - No. 28)
In what interval is the function f : x -> 2x - x\(^2\) increasing?
x = 1
x < 1
x > 1
0 < x < 1
คำอธิบาย
2x - x\(^2\) > 0
0 > x\(^2\) - 2x
x\(^2\) - 2x < 0
x(x - 2) < 0
x > 1
2x - x\(^2\) > 0
0 > x\(^2\) - 2x
x\(^2\) - 2x < 0
x(x - 2) < 0
x > 1