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Moxamed

U.S
Joined: Oct 30, 2008
Posts: 1
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HELP ! ! ! !

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Graph: ( Show Graph PLS )
1. Y=5^(x-2)-3
2. f(x)=log1/5 (x+2)
3. f(x)=(1/4)^x +2.
Find Range
4. f(x)=-4x^2-56x-201
Solve Equation & Give An Exact Solution
5. log(x+9)=1 - logx

[Oct 30, 2008 11:34:51 AM]

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pskinner

Joined: Apr 2, 2005
Posts: 694
Status: Offline

Re: HELP ! ! ! !

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Graph: ( Show Graph PLS )
1. Y=5^(x-2)-3
2. f(x)=log1/5 (x+2)
3. f(x)=(1/4)^x +2.
Find Range
4. f(x)=-4x^2-56x-201
Solve Equation & Give An Exact Solution
5. log(x+9)=1 - logx

To plot 1, 2, or 3 above, you need to be an A+ Member. Then, you would enter just the right hand side into the function graphing calculator:

1. 5^(x-2)-3
2. log((1/5)(x+2) (not sure what you meant here)
3. (1/4)^x+2

For 4, you can plot as a member and get the range in the tutorial information.

For 5:

log(x+9)+log(x)=1
log(x+9)x=1
Assuming this follows usual notation that the base is 10:

(x+9)x=10^1=10

x^2+9x-10=0
(x+10)(x-1)=0

x=-10 or x=1 solves this equation, but -10 is not permitted since it is not in the domain of the log function, so you can check that x=1 works.
----------------------------------------
Principal Skinner

[Oct 30, 2008 8:49:58 PM]

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