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xz_007 [3.2K]
2 years ago
13

What types of numbers are undefined when they are under a radical sign? If you were dealing with the number √-1, would it be def

ined if you multiplied it by 2? Would it be defined if you subtracted some real number from it? Would it be defined if you squared it? Would it be defined if you cubed it?
Mathematics
1 answer:
Misha Larkins [42]2 years ago
8 0
The square root of a a negative integer is imaginary.
It would still be a negative under a square root if you multiplied it by 2, therefor it will still be imaginary, or I’m assuming as your book calls it, undefined.
2•(sqrt-1) = 2sqrt-1

If you add a number to -1 itself, specifically 1 or greater it will become a positive number or 0 assuming you just add 1. In that case it would be defined.
-1 + 1 = 0
-1 + 2 = 1

If you add a number to the entire thing “sqrt-1” it will not be defined.
(sqrt-1) + 1 = 1+ (sqrt-1)

If you subtract a number it will still have a negative under a square root, meaning it would be undefined.
(sqrt-1) + 1 = 1 + (sqrt-1)

however if you subtract a negative number from -1 itself, you end up getting a positive number or zero. (Subtracting a negative number is adding because the negative signs cancel out).
-1 - -1 = 0
-1 - -2 = 1

If you squared it you would get -1, which is defined
sqrt-1 • sqrt-1 = -1

and if you cubed it, you would get a negative under a square root again, therefor it would be undefined.
sqrt-1 • sqrt-1 • sqrt-1 = -1 • sqrt-1 = -1(sqrt-1)

Sorry if this answer is confusing, I don’t have a scientific keyboard, I’ll get one soon.
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Marcus said the product of 78 × 134 is 94.<br><br> How can you tell that his answer is wrong?
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7 0
3 years ago
I round to 900 I have twice as many hundreds as ones and all my digits are different but their sums are 18 can someone answer th
stellarik [79]

Answer:

The number of once is 9.1  

The number of hundreds is 8.9

Step-by-step explanation:

Given as :

The total of digits having ones and hundreds = 900

The sum of digits = 18

Let The number of ones digit = O

And The number of hundreds digit = H

So, According to question

H + O = 18             .........1

100 × H + 1 × O = 900          ........2

Solving the equation

( 100 × H - H ) + ( O - O ) = 900 - 18

Or, 99 H + 0 = 882

Or , 99 H = 882

∴   H = \frac{882}{99}

I.e H = 8.9

Put the value of H in eq 1

So, O = 18 - H

I.e  O = 18 - 8.9

∴    O = 9.1

So, number of once = 9.1

number of hundreds = 8.9

Hence The number of once is 9.1  and The number of hundreds is 8.9

Answer

4 0
3 years ago
Azul bought 10 reams of paper at the tore for a total cost of 84$ the tax on the purpose was 4$ what equation could be used to r
tankabanditka [31]

Answer:

The equation 10x+4=84  could be used to represent this situation.

Step-by-step explanation:

Given:

Azul bought 10 reams of paper at the store for a total cost of $84 the tax on the purpose was $4.

Now, to find the equation that could be used to represent this situation.

Let the cost of a ream of paper be x.

Total reams of paper = 10.

The tax on the purpose = $4.

The total cost = $84.

Now, to write an equation to represent this situation:

10\times x+4=84

10x+4=84

Therefore, the equation 10x+4=84  could be used to represent this situation.

6 0
2 years ago
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