Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
(a) \[\neg(\pi>3.2)\quad\longrightarrow\quad\pi\leq 3.2\](b) \[\neg (x < 0)\quad\longrightarrow\quad x\geq 0\](c) \[\neg(x^2 > 0)\quad\longrightarrow\quad x=0\] (d) \[\neg(x = 1)\quad\longrightarrow\quad x\neq 1\](e) \[\neg\neg \psi\quad\longrightarrow\quad \psi\]
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
any mistakes?
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
sure?
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
its correct. except for imaginary x
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
so this is a more gerneral answer to c)\[\neg(x^2 > 0)\quad\longrightarrow\quad x\in\Im\]?
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
yup. but if it is mentioned that x is real, then x=0. else x belongs to imaginary.
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
sorry, x belongs to imaginary or x=0
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
\[\longrightarrow \Re(x)=0\]
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
im a bit confused, what if x is complex
 one year ago

hartnn Group TitleBest ResponseYou've already chosen the best response.1
but, if x is complex then u x^2 can be positive. yes,even i was thinking that. better assume x as real then x=0
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
im not sure
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
maybe all i can do is this \[\neg(x^2 > 0)\quad\longrightarrow\quad x^2\leq0\]
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
@AccessDenied
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
what is the best answer for part (c)
 one year ago

Jemurray3 Group TitleBest ResponseYou've already chosen the best response.2
Typically when you're talking about statements of logic you work in real numbers for simplicity just to get the ideas of negation and implication and all that stuff down. I would mark (c) as correct. Furthermore, since complex numbers are not ordered, the symbols don't make sense for complex numbers, lending credence to the assumption that the quantities in question are real.
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
so i should leave it as i had it at the top of the page then ,
 one year ago

Jemurray3 Group TitleBest ResponseYou've already chosen the best response.2
I would say yes.
 one year ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
thanks
 one year ago
See more questions >>>
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.