Question

Please discuss problems in your group and arrive at a solution together. If your entire group is confused, ask for help. Each student is responsible for understanding the material covered in this group work assignment. 1. For each function f(a), find the domain. Then find the critical numbers. Recall: critical numbers are a-values in the domain where f'(x)=0 or f'(x) DNE. (a) f(z) = 2+2 Domain: critical numbers = (b) f(x) = re Domain: critical numbers =

Answer 1

2) a) fe= x+2 xt1 Domain off it where fin detined i.. x+140 X+12 l.e. Dom(t) = {AGIR) x + -) }, for critical point f'(x) = (x+1).1 - (x+2). 1 (x+12 as f'(x) & 0& XAR. critical point does not Earpt (DNE). 6) taxet domain is whole real line as. It is multiple of poly, and exponential both have domaly IR. ie Dom(t) = 12 here, f'(x)= xelt e x. for critical point f'lnico. .e xex+8 =0 exj6 (x+7)=0 2 x=0,-7 is only critical pt.

2+x - (2) f(x)= x 946 en fase ( (1) - *). ) for increasing of' must greater than zero but here and best to podretning f'(x)=- 3 not xa (24.x2 1 of is never b e increasing. for decreasing f must less than zero. as & Lo 4 XERAZ-2]. If is dee on (00-2) (-2,00) Acc. to guidlines we have to do only est four parts. Please rate if you happy with this Explaination. 2015