Answer
a) An exponential equation is one which the variable occurs in the exponent.
b) For solving exponential equation
1. Isolate the exponential expression on one side of the equation
2. Take the logarithm of each side, then use the Laws of Logarithm to "bring down the exponent"
3. Solve for the variable
c) $2^x=19$
$\log(2^x)=\log19$
$x\log2=\log19$
$x=\frac{\log19}{\log2} \approx 4.25$
Work Step by Step
As given above
