silly square root question

[bmwhype]

on the gmat, is the square root of 1, positive 1 or positive 1 and negative 1?

[coyote]

In general the answer would be +/- 1.

Click on this link to read a thread with similar discussion.

 

http://www.www.urch.com/forums/gmat-math...t-algebra.html (Fast Algebra)

 

But Isr says in this post that square root of x = |x| for all the problems in GMAT. Also read the problem and its solution. For the particular problem in that thread, without using the above property the OA cannot be obtained. So I think it is right to assume only the positive value of square root for GMAT problems.

[pandeyrav]

In general the answer would be +/- 1.

Click on this link to read a thread with similar discussion.

 

http://www.www.urch.com/forums/gmat-math...t-algebra.html (Fast Algebra)

 

But Isr says in this post that square root of x = |x| for all the problems in GMAT. Also read the problem and its solution. For the particular problem in that thread, without using the above property the OA cannot be obtained. So I think it is right to assume only the positive value of square root for GMAT problems.

 

 

interesting point

[bmwhype]

In general the answer would be +/- 1.

Click on this link to read a thread with similar discussion.

 

http://www.www.urch.com/forums/gmat-math...t-algebra.html (Fast Algebra)

 

But Isr says in this post that square root of x = |x| for all the problems in GMAT. Also read the problem and its solution. For the particular problem in that thread, without using the above property the OA cannot be obtained. So I think it is right to assume only the positive value of square root for GMAT problems.

 

thanks

 

The question related to this question was

http://pic18.picturetrail.com/VOL894/4332674/16278787/286785241.jpg

[v-rap]

Say x^2 = 1

then x = +1 or -1

 

For sqrt(1) = 1

there is no -ve value here.

[bmwhype]

thanks