5. The height of a drone in metres over time in minutes is given by f(x) = 3 - log₂ (x - 1). The height of a second drone in metres over time in minutes is given by g(x) = log₂x + log₂ (x + 2). Determine the time when the two drones will be at the same height and state the height as well. Only algebraic solutions will be accepted.

4. Determine if each of the following functions is exponential or not. If so, write the function in the form f(x) = ab" (showing ALL work in doing so) and list the values of a and b. If not, simply write “Not exponential". (a) f(x) = 30Vr8 (b) f(æ) = 7·(v2)* (b) f(x) = 3

Please solve quckily

Let b be a real number. By considering properties of exponential functions, show that the points P(1,0) and Q(b²,2) are points on the curve C given by y = log, (x) for b>1. Note that your response should be written in sentences, and logically justified to gain full marks. To express exponentials in text, the symbol '^' can be used. For example, two cubed can be expressed as '2^3'.