what is the difference between "square root" and "pricipal sqare root" ? please explain the concept clearly.
also find the error bellow
in which step and why :
√(-4)^2 = 4
or, (-4)^(2×1/2) = 4
or, (-4)^1 = 4
or, -4 = 4
realsujaykumar:
plz give the answer only when you know the concept very well
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Square root and principal square root :
A square root is a combination of positive and negative.
Principal square root is the one that is not negative.
Ex: Square root of 36 is - 6 and +6.
The principal square root of 36 is +6(not -6).
Now the errors in the following are :
1. root 16 = 4(correct)
2. (-4)^(2 * 1/2) = -4
3. (-4)^1 = -4
4. cannot be determined.Mostly -4
Hope this helps!
A square root is a combination of positive and negative.
Principal square root is the one that is not negative.
Ex: Square root of 36 is - 6 and +6.
The principal square root of 36 is +6(not -6).
Now the errors in the following are :
1. root 16 = 4(correct)
2. (-4)^(2 * 1/2) = -4
3. (-4)^1 = -4
4. cannot be determined.Mostly -4
Hope this helps!
After making conversation with you in the comment section, I came to know that RHS should not be considered.
I cannot able to change the answer now because there is no edit option.
hey bro i said that because you're confused
Yes. You are right. I am confused very much in the beginning.
as we all know if a= b , and a= c then also a= c
Yes.
Anyway, I did a mistake and I think I have rectified it. Thanks for that. Gud n8 bro
the does not finished bro
question doesn't finished bro
i think you'll still confused because you've still not able to find out error
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