Interview Question: Push to the Limit

Sample Question #120 (mathematics)

What is the limit of sqrt(x2+x) – x as x goes to infinity

(Comment: limit questions are popular at quant interviews)

Advertisements
This entry was posted in Sample Qs. Bookmark the permalink.

One Response to Interview Question: Push to the Limit

  1. Brett says:

    ANSWER
     
    Multiply the expression by [sqrt(x^2+x) + x] / [sqrt(x^2+x) + x]. The numerator becomes x, and the denominator [sqrt(x^2+x) + x] is approximately 2x when x is large. So the answer is 1/2.
     

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s