Page 77 - Math Grade 12 (Basic)

PROEUS DARA
0
jj ~ x = 0 m2J f(O) = - ~ '1

2 y
v = - 9x + 4
_
y = _? __
1 X-+ - 12 J

y = 2
~ -
12
4 0 3 /4 X
+ - = -9x+4

+2x-24 = 2i 9x+4
X = -4 )( = 3
0 ~ 28
1 J X = 28 S'"J <dJ X = l '1

3i-18x+25
= 2
x - 6x + 8
-6x+8 = o 'HlS'i.Hufi~~ x = 2 2t~ x = 4 '1 i:lmsg
~ u

2 2 2 2
f'(x) = (3x -18x + 25)'(x - 6x + 8)- (3x - 18x + 25)(x - 6x + 8)'
+ 8)2

-2x+6
=------,-
2 2
(x -6x+8)
j'(x) = 0 sl2J X = 3
2
thmg X= 3 m2J f(3) = 3(3) -18(3)+25 = 27-54+25 = 2
2
3 -6(3)+8 9-18+8

2
= lim 3x 18x+25 = 3
x-> ±co 6x + 8

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