Lesson: Introduction to Exponents

You need an account to watch this video

return to
module page

flag video to
rewatch later

Comment on Introduction to Exponents

Hi!

HannahEWolfe - May 12, 2020

Hi!

So I was working on this practice question: https://greprepclub.com/forum/x-is-an-integer-greater-than-1724.html

I got confused, the answer is "D." someone in the comments said that when X=1, A is greater. I am confused because the given info says X is "an integer greater than 1." I assumed that this means it could not equal 1, because 1 is not greater than 1. Is that thinking not right?

reply

greenlight-admin's picture

Question link: https:/

greenlight-admin - May 12, 2020

Question link: https://greprepclub.com/forum/x-is-an-integer-greater-than-1724.html

You're right; the person should have tested a different value. Let's do that.

CASE I: If x = 2, we get:
QUANTITY A: 3^(x + 1) = 3^(2 + 1) = 3^3 = 27
QUANTITY B: 4^x = 4^2 = 16
In this case, Quantity A is greater.

CASE II: If x = 4, we get:
QUANTITY A: 3^(x + 1) = 3^(4 + 1) = 3^5 = 243
QUANTITY B: 4^x = 4^4 = 256
In this case, Quantity B is greater.

Answer: still D :-)

reply

THANKS!

HannahEWolfe - May 12, 2020

THANKS!

reply

Add a comment

Have a question about this video?

Post your question in the Comment section below, and Brent (the course creator) will answer it as fast as humanly possible.

Change Playback Speed

You have the option of watching the videos at various speeds (25% faster, 50% faster, etc). To change the playback speed, click the settings icon on the right side of the video status bar.

Free “Question of the Day” emails!