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Algebra II Pre-AP Properties of Logarithms Express each logarithm in #1 - 4 in terms of log M and log N , M , N > 0 . That is, write each log in expanded form. A Problems (Required) 6 1) log M N ⎛M ⎞ ⎟ ⎝N⎠ 3 2) log M 6 3) log⎜ 4) log 3 4 B Problems (Optional) 3 M N4 3 3) log(MN ) N 2) log M 1) log M2 N N M5 N3 4) log 4 Express as a rational number or a logarithm of a single quantity. Simplify as much as possible. 5) log 20 + log 30 − log 6 5) 2 log 5 + log 40 6) 4 log 3 A − 1 log 3 B 3 1 7) ln 10 − ln 5 − ln 8 3 8) log 2 x − log 2 ( y + 3) 1 log 4 Q 3 1 7) 2 ln 6 − ln 3 + ln 16 2 8) log5 x − log5 ( y + 2 ) 9) log 2 x − log 2 y + 3 9) log 5 x − log 5 y + 2 10) log 9 81 − log 9 3 10) log 4 40 − log 4 5 11) 12) 13) 14) 6) 5 log 4 P + 2 ln 64 − ln 5 + 3 3 3 log 0.1 + 4 log 0.01 − 2 log 0.001 log 3 ( x − 5) − log 3 (2 x + 3) 1 (logb M + logb N − log b P ) 2 log x + log x + 3 log x 11) 12) 13) 14) 3 ln 81 − ln 3 − 2 2 2 log 0.01 + 4 log 0.1 − 3 log 0.001 log 4 ( x + 5) − log 4 (2 x − 3) 1 (logb M − 2 log b N + log b P ) 3 ln x + 2 ln x + 3 ln x 15) Use the change of base formula and a calculator to evaluate #16 - 18. Round to 0.001. 17) log 1 81 18) log 47 13 16) log 7 101 17) log 0.2 62 18) log 98 31 16) log 5 48 15) 2 19) (log5 16)(log 2 5) 21) 2 log2 8 22) 5 Evaluate #19 - 23 without using a calculator. 20) (log 7 25)(log 5 3)(log 9 7 ) 19) (log 6 32 )(log 2 6 ) log5 25 log3 17 23) 3 24) b logb x 21) 3 log 3 27 22) 6 20) log 6 36 (log7 9 )(log3 16)(log 2 7 ) 23) 4 log 4 19 24) b logb x Solve each logarithmic equation in #25 - 38. Express your solution in calculator-ready form. Do not use a calculator. Leave answers in terms of e, as necessary. Be sure to check your domain. 25) log(2 x − 4 ) = 2 26) ln x 2 − 48 = ln (2 x ) 25) log(3x − 20 ) = 2 26) ln x 2 − 50 = ln (5 x ) ( 27) log 3 x + log 3 ( x − 2 ) = 1 ) ( 27) log x + log( x − 21) = 2 ) 28) log 4 ( x + 1) + log 4 5 = 2 28) log 6 ( x − 2 ) + log 6 18 = 2 30) log x + log( x + 21) = log 5 25 30) log( x − 1) + log( x + 2 ) = log12 12 29) 2 log 3 x − log 3 ( x − 2 ) = 2 29) log 3 x − log 3 ( x + 4 ) = 2 31) log 5 ( x + 2 ) − log 5 ( x − 2 ) = 1 31) log 2 (4 x + 10) − log 2 ( x + 1) = 4 32) ln x + ln ( x + 3) = ln 10 32) 2 ln x = ln ( x + 2 ) 33) log 2 (log 4 x ) = 1 34) log 5 (log 3 x ) = 0 33) log 4 (log 3 x ) = 1 34) log 3 (log 5 x ) = 0 35) log x − 1 = 3 36) log x − 1 = 2 35) log x − 1 = 2 36) log x 2 − 1 = 3 37) ln ( x + 1) = 2 38) 3 ln 4 x + 5 = 14 37) ln ( x − 2 ) = 1 38) 2 ln 3x + 1 = 13 ( 2 ) ( )