x<2
x≤2
x=2
x>−2
Correct answer is B
f:x→√4−2x defined on the set of real numbers, R, which has range from (−∞,∞) but because of the root sign, it is defined from [0,∞).
This is because the root of numbers only has real number values from 0 and upwards.
√4−2x≥0⟹4−2x≥0
−2x≥−4;x≤2
A binary operation ∆ is defined on the set of real numbers R, by x∆y = \(\sqrt{x+y - \frac{xy}{4...
A function f is defined by f:x→x+2x−3,x≠3.Find the inverse of f&...
The 3rd and 6th terms of a geometric progression (G.P.) are 83 and 6481 re...
Face 1 2 3 4 5 6 Frequency 12 18 y 30 2y 45 Given the table abov...
Two forces (2i - 5j)N and (-3i + 4j)N act on a body of mass 5kg. Find in ms−2, the magnitude ...
Find the coefficient of x3 in the binomial expansion of (3x+4)4 in ascending powers of x...
Given that a = 5i + 4j and b = 3i + 7j, evaluate (3a - 8b). ...