1.9.10 Differentiate e^kx, a^kx and ln x (A-level only)

The concentration, $C$ , of a chemical reagent in a reaction vessel is modeled by the equation

\frac{5}{2t^4} + 0.8^t, \quad t \ge 1

where $t\,$ is the time in minutes.

Find an expression for $dCdt\displaystyle \frac{dC}{dt}$ .

[2]

The concentration, $C$ , of a chemical reagent in a reaction vessel is modeled by the equation

\frac{5}{2t^4} + 0.8^t, \quad t \ge 1

where $t\,$ is the time in minutes.

Find an expression for $dCdt\displaystyle \frac{dC}{dt}$ .

[2]

1.9.10 Differentiate e^kx, a^kx and ln x (A-level only) Questions