A community for students.
Here's the question you clicked on:
 0 viewing
Meehan98
 one year ago
Identify a counterexample to disprove n3 ≤ 3n^2, where n is a real number.
n = 2
n = −1
n = 0
n = 0.5
Meehan98
 one year ago
Identify a counterexample to disprove n3 ≤ 3n^2, where n is a real number. n = 2 n = −1 n = 0 n = 0.5

This Question is Closed

Meehan98
 one year ago
Best ResponseYou've already chosen the best response.0It's supposed to be n^3 < or equal to 3n^2.

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1just put the 4 values into the inequality only one of them gives an incorrect result  but that proves the inequality is not true for all real numbers, as required

Meehan98
 one year ago
Best ResponseYou've already chosen the best response.0I did that and I got; 8<12=true 1<3=true 0=0=true .25<.75=false

Meehan98
 one year ago
Best ResponseYou've already chosen the best response.0So, it would be 0.5 but that's incorrect.

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1however 0.125 <=0.75 so I believe 0.5 IS the correct answer

Meehan98
 one year ago
Best ResponseYou've already chosen the best response.0Okay, the computer must be incorrect then.

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1hold on a minute tho sorry...

MrNood
 one year ago
Best ResponseYou've already chosen the best response.10.5^3 =.125 so the inequality IS true but it is also true for all the other answers

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1if x>3 then the inequality is false  but that is not an option did oyu type the question correctly?

Meehan98
 one year ago
Best ResponseYou've already chosen the best response.0This is a screenshot of the exact problem, and the red arrow means that's the answer I picked and it was incorrect.

MrNood
 one year ago
Best ResponseYou've already chosen the best response.1yeah  as I corrected myself  ALL the answers seem to give a correct solution to the inequality  so none is a 'counterexample' any value x>3 IS a counterexample

Meehan98
 one year ago
Best ResponseYou've already chosen the best response.0hmm.. okay. Thank you.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.