Logarithmic Equations Worksheet Page 3

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ID: A
9 ANS:
Ê
ˆ
23 
2
 4(1)(92)
Á Á
˜ ˜
(23)
2
 7x  12
x
Á Á
˜ ˜
 3
x 
 17.84, 5.16
log
Á Á
˜ ˜
2x  10
2
2(1)
Á Á
˜ ˜
Ë
¯
2
 7x  12
x
 8
2x  10
 7x  12  16x  80
2
x
2
 23x  92  0
x
REF: 081539a2
10 ANS:
Ê
ˆ
Á Á
˜ ˜
2
 p  4
3
p
Á Á
˜ ˜
log
Á Á
˜ ˜
2p  11
16
Á Á Á
˜ ˜ ˜
4
Ë
¯
3
2
 p  4
p
4
 16
2p  11
2
 p  4
p
 8
2p  11
 p  4  16p  88
2
p
2
 17p  84  0
p
(p  21)(p  4)  0
p  21,4
REF: 061639a2
2

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