AFISWERS
TO
PRACTICE
PROBLEMS
FOREXAM #2
I
a)
P(x):
(-ll4)x{
-
l5x3+
630x2
+879x
-75
b) P'(xF
-
x345r2
+D60x+E79
P"(xF
-3x2 -9Ox+1260
C'(xF
x3-1260x-990
c)
7791
d)
-14382
2) 387.r5E
3 a)
$59,472
b)
$591562
4) 9.4Vo
i,
7.2Vo
6)3r
7) z14,N2Millionlyr
8)
.20
9)
r=4