- #1

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sqrt(-1 * 1)

I come up with a Math Error or Infinity(varying on the caclulator used).

Explinations?

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- Thread starter SSan
- Start date

- #1

- 3

- 0

sqrt(-1 * 1)

I come up with a Math Error or Infinity(varying on the caclulator used).

Explinations?

- #2

BoulderHead

Good luck

- #3

- 184

- 0

What about the square root of

As a matter of fact, that's true for the square root of any negative number. Furthermore, it's true for any even root of any negative number. Your calculator is giving you an error because it's only designed or configured to display real numbers, and there aren't any real numbers that answer the question, "what is the square root of negative one?"

- #4

Gokul43201

Staff Emeritus

Science Advisor

Gold Member

- 7,051

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1 = SQRT(1) = SQRT(-1*-1) = SQRT(-1)*SQRT(-1) = SQR(i) = -1

Kinda clever for a couple of seconds, until you look at the first step again.

- #5

- 92

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sqrt(-1) = i

sqrt(-4) = 2 i

sqrt(-6) = 2.44948974 i

and so on...

Any calculator under TI-89 will give you an "nonreal ans" because they are not programmed to recongnized imaginary numbers unless otherwise told to.

- #6

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killerinstinct said:Any calculator under TI-89 will give you an "nonreal ans" because they are not programmed to recongnized imaginary numbers unless otherwise told to.

I tried my TI-89 and it gives me an error when I try to do the Sqrt(-x); x being any numerical digit. Do you know of a way to remedy this, or is the TI-89 also a calculator which won't return

- #7

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catch.yossarian said:I tried my TI-89 and it gives me an error when I try to do the Sqrt(-x); x being any numerical digit. Do you know of a way to remedy this, or is the TI-89 also a calculator which won't returnfor an answer?i

Your calculator should have a MODE button. If you press it a list of options should come up, and one of them should be "complex format". If it's set to "real" then complex numbers will not work.

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