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Math Help - Solving inequalities in TI-V200

  1. #1
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    Solving inequalities in TI-V200

    Hi.

    I have a ti-v200 calculator and a problem with it.

    I want to solve a simple inequality like this:
    x^2>1

    I read the user manual. the command is written like this:
    solve(x^2>1,x)

    The response must be:
    x<-1 or x>1

    but it shows the exact inequality!!!!!!!!
    x^2>1

    Does anybody know what the problem is?
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by amir_a View Post
    Hi.

    I have a ti-v200 calculator and a problem with it.

    I want to solve a simple inequality like this:
    x^2>1

    I read the user manual. the command is written like this:
    solve(x^2>1,x)

    The response must be:
    x<-1 or x>1

    but it shows the exact inequality!!!!!!!!
    x^2>1

    Does anybody know what the problem is?
    I couldn't tell you exactly, but when my TI-92 does that it means that the built in algorithms can't solve the problem. Are you certain that the V200 can solve quadratic inequalities?

    Another thought: Have you tried this with the calculator in "Approximate" mode? Often my 92 can solve problems approximately where it can't solve it exactly.

    -Dan
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  3. #3
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    Quote Originally Posted by topsquark View Post
    I couldn't tell you exactly, but when my TI-92 does that it means that the built in algorithms can't solve the problem. Are you certain that the V200 can solve quadratic inequalities?

    Another thought: Have you tried this with the calculator in "Approximate" mode? Often my 92 can solve problems approximately where it can't solve it exactly.

    -Dan
    I tested the approximate mode. but the problem still exists. I see this example in the user manual of v200. So it can solve quadratic inequalities for sure.
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  4. #4
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    Quote Originally Posted by amir_a View Post
    Hi.

    I have a ti-v200 calculator and a problem with it.

    I want to solve a simple inequality like this:
    x^2>1

    I read the user manual. the command is written like this:
    solve(x^2>1,x)

    The response must be:
    x<-1 or x>1

    but it shows the exact inequality!!!!!!!!
    x^2>1

    Does anybody know what the problem is?
    Just go to the Ti website and download the OS v3.10 for the V200. You should be all set.
    Here the link: http://education.ti.com/educationpor...Id=1&appId=276
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