794
Answer Key
a. 1; b. 1 119 .
⎛ ⎝ f ( x )−3 g ( x ) ⎞
f ( x )−3 lim
g ( x ) =0+6=6
lim x →−3 −
⎠ = lim
x →−3 −
x →−3 −
⎛ ⎝ lim
⎞ ⎠
g ( x )
2+
2+ g ( x )
2+0
x →−5
121 . lim
f ( x ) =
2 =1
f ( x ) =
lim x →−5
x →−5
= 2+5 3 = 7 3
f ( x )− g ( x ) 3 = lim x →1 3
f ( x )− lim x →1
g ( x )
123 . lim x →1 125 . lim
⎛ ⎝ lim
x ⎞ ⎠
⎛ ⎝ lim
⎞ ⎠ +2 lim
x →−9 ⎛
⎝ xf ( x )+2 g ( x ) ⎞
x →−9 ⎛
⎞ ⎠ = (−9)(6) + 2(4) = −46
f ( x )
⎝ g ( x )
⎠ =
x →−9
x →−9
127 . The limit is zero.
129 . a.
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