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Within what is the function f (x) = x & # 178; - 4x + 3 a decreasing function
f(x)=x²-4x+3
=x²-4x+4-1
=(x-2)²-1
The function f (x) = x & # 178; - 4x + 3 is a decreasing function in (- ∞, 2]
The function f (x) = x & # 178; - 4x + 3 (?) a is a decreasing function in (- ∞, 2), B is a decreasing function in (- ∞, 4), C is a decreasing function in (- ∞, 0)
If D is a decreasing function in (- ∞, + ∞), which one
A, well, how do I feel C is right
F (x) = x & # 178; + 4x + 3 find the decreasing function in (negative infinity, - 2)
The teacher stipulated to set x1
Let X10, X1 + x2 + 4
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