Question
Question: Domain of f(x) satisfying 2<sup>x</sup> + 2<sup>f(x)</sup> = 2 is...
Domain of f(x) satisfying 2x + 2f(x) = 2 is
A
(-1, 1)
B
(-∞, -1)
C
(-∞, 1)
D
None
Answer
(-∞, 1)
Explanation
Solution
2f(x) = 2 – 2x ⇒ 2 - 2x > 0 ⇒ 2X < 2 ⇒ x < 1