...hi i've got a question and i'm coming up with a slightly different answer to my textbook so could someone please show me what i'm doing wrong:
find the set of values of x for which the function h, where is increasing
well the first thing i did was expand the brackets and differentiate:
then arranged it like so:
when you divide both sides of an inequality by a negative value, the direction of the inequality changes.
the books answer is
any help would be appreciated, thanks