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 usg543
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Registered: 04/21/08
Posts: 7,259
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 Re: math exam tomorrow  [Re: Picklez]
#146928 - 11/18/08 10:43 PM (16 years, 3 months ago) |
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easy way is plug in numbers for x
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Picklez]
#146929 - 11/18/08 10:44 PM (16 years, 3 months ago) |
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or use a graphing calculator if you want to be lazy and look at the graph. what can y be is what you want to know.
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Picklez]
#146932 - 11/18/08 10:47 PM (16 years, 3 months ago) |
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usg543
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Registered: 04/21/08
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Re: math exam tomorrow [Re: usg543]
#146933 - 11/18/08 10:49 PM (16 years, 3 months ago) |
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Coaster]
#146936 - 11/18/08 10:56 PM (16 years, 3 months ago) |
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Quote:
Coaster said:
Quote:
KillerPicklez said:
Can u explain how to do it rather than just give me an incorrect answer
the range is all the values that y takes on
so y do u think its wrong
yeah answer is right unless the formula you gave us is wrong.
if you meant for the whole exponent to be x+1 you need to put it in ( ) like this: 5-2^(x+1) then the answer would be...
Range: [5,-infinity)
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Picklez]
#146946 - 11/18/08 11:05 PM (16 years, 3 months ago) |
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make sure to use those ( ) they are key. especially with a graphing calculator like the ti-83.
common mistake though. keep up the good work 
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Picklez]
#146964 - 11/18/08 11:21 PM (16 years, 3 months ago) |
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if you are finding the range you are really solving for what y could be.
so you can graph it and look at the graph. figure out what value y can be and what it can't be. like y can't be 7 in that problem.
one way to do this is just plug in numbers for x
make a chart like this
x | y
----------
-inf |
-10 |
0 |
10 |
inf |
then solve for Y. you will want to use more numbers for x... but when you get the hang of it it will be easy. for infinity just substitute it for a very large number like 9999999.
i'm sure there's other ways (do you know how to find limits??) but it's been a long time since i finished calculus 1 and 2.
hope that helped, good luck. i have to go to bed. night.
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Coaster]
#146973 - 11/18/08 11:29 PM (16 years, 3 months ago) |
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Quote:
Coaster said:
i dont understand how u can have a final coming up and not even no the basix 
i see what kind of teacher you are gonna be. the arrogant teacher who think he knows it all, and doesn't explain or teach things well 
i hope not though.
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Picklez]
#146979 - 11/18/08 11:40 PM (16 years, 3 months ago) |
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good luck
night
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: wowitch420]
#146986 - 11/18/08 11:53 PM (16 years, 3 months ago) |
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i like math and science
i also score well on reading and grammar and such.
but writting.. i hate. don't make me write a paper.
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usg543
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Registered: 04/21/08
Posts: 7,259
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Quote:
still beLIEve said:
i like math and science. not the writing ones.
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usg543
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Registered: 04/21/08
Posts: 7,259
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Re: math exam tomorrow [Re: Picklez]
#147348 - 11/19/08 06:05 PM (16 years, 3 months ago) |
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Quote:
KillerPicklez said:
im about to own this kid. hes bringing me an OC80, he just doesnt know hes fronting it to me yet
i hate those guys...
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usg543
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Registered: 04/21/08
Posts: 7,259
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random people?? lol
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usg543
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Registered: 04/21/08
Posts: 7,259
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ah yeah i hate when people think they know their shit but have no idea.
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