Find the derivative of f(x) = 9x + 5 at x = 7.
can someone show me a simple way to do this o_o

The derivative of f(x) = 9x + 5 at x = 7 is:

The derivative of a function is the rate of change of the dependent variable i.e. y=f(x) with respect to the independent variable i.e. x.

The derivative of the function f(x) is given by:

Now, we know that:

where c is a constant term.

Here we have the function f(x) as:

Hence,

i.e.  

Also, when x =7 we have:

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step-by-step explanation: