December 12, 2014
Precalc Warm Up # 2-5
Get in groups and solve the system:
xy = 2
2log 2 x - log y = 2
2
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xy = 2
2log2 x - log 2 y = 2
So (2,1) is the
solution
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Questions on #2-4?
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nd
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solve
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solve
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In Groups, solve the following. (give answers to 4 places
after the decimal.) Be ready to present to class.
. x-3 = 58
1. 2 + 4⋄10
2. 4-e-6x = 1
3.
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1. 2 + 4⋄10x-3 = 58
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2. 4-e-6x = 1
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3.
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The previous problems were exponential equations. The
following are logarithmic equations. Try these in groups,
and be prepared to present:
4. logx+2(3x2+4x-14) = 2
5. log2(2x+1-8) = x
6. lnx - ln(x+5) = 6
7. 2log(x+1)+logx=2
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4. logx+2(3x2+4x-14) = 2
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5. log2(2x+1-8) = x
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6. lnx - ln(x+5) = 6
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7. 2log(x+1)+logx=2
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7. 3
x+2
-3
x+4
x+1
=3
Could these be made into "like" terms?
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This one will have a solution. Solve it algebraically.
7. 3
x+2
-3
x+4
= -162
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Can you make these into "like" terms?
e2x-4ex-5 = 0
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Try this one
22x+3 - 7·2x+1 + 5 = 0
silly!
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#2-5p. 228 7LC, 9-16 LC on all
The Unit Test is coming next Thursday. It covers:
4.1-4.5 in PC book
7.1.2, 7.1.3. , 7.1.4, 7.1.5, in SL book