Given -
Where b>1
To Find -
a. Which is the graph of f(x) = -bˣ
b. Which is the graph of f(x) = b-ˣ
c. For which graph(s) is the range (-∞, 0)
Step-by-Step Explanation -
a. Since b > 1
So, bˣ will be positive
f(x) = -bˣ will be negative.
So,
The correct Option is B.
b. f(x) = b-ˣ
So, b-ˣ will be positive
Also, in -x will tends to 1
So,
The correct Option is A
c. Range of (-∞, 0)
So,
we can observe the value of y tending to -∞ in graphs B and D.
Final Answer -
a. Option B
b. Option A
c. Options B and D