The following is Mobius' explanation for a solution to this question. You can use this and other online references as a but your explanation should be in your own words.

The derivative of a function of fat is given by

f(x+h)-f(x) h-0 h

provided the limit exists.

Use the definition of the derivative to find the derivative of

$(u) = 7x2 + 3x + 6.

Enter the fully simplified expression for f (x +h) - f (1). DO factor. Make sure there is a space between variables.

Show your work and explain, in your own words, how you an at your answers.