00:01
The function f is given by f of x equal a times c raised to the power x, where a is a positive number and c is greater than 1.
00:14
Which of the following is true about the values of constants m and b in the equation natural logarithm of f of x equal mx plus b? so we have four options.
00:26
And then we get to apply natural logarithm to the function f of x to see the equation of this type we get.
00:36
So the natural logarithm of f of x is the natural logarithm of this expression, which is f of x, a times c raised to the x power.
00:54
Now we apply the properties of the logarithm function.
00:57
Function.
00:57
The first one is we have a product, logarithm of a product is the sum of the logarithm of the factor, so it's equal to natural logarithm of a plus the natural logarithm of c raised to the x power.
01:12
And now we apply again a property of the logarithm to the term natural logarithm of c raised to the x power.
01:20
When we have a power, the exponent goes down to multiply the logarithm of the base, that is natural logarithm of c raised to the x power is equal to x times the natural logarithm of c and so to apply these two formulas we need to have that a and c are or must be positive values in this case both are positive indeed c is greater than 1 c is greater than 1 and so is positive and so is a which is is a positive value...