Post Reply 
Just ask your calculator
04-12-2017, 01:20 PM
Post: #1
Just ask your calculator
[Image: v6rVa8o.png]

Found on a book preparing for nationwide tests after high school.

Wikis are great, Contribute :)
Find all posts by this user
Quote this message in a reply
04-12-2017, 05:13 PM
Post: #2
RE: Just ask your calculator
Is that CAS or Home mode?

Home gives an error.

CAS gives infinity on the Prime.

For my HP71 it depends on the flag settings. If you work hard you can get NaN.
Find all posts by this user
Quote this message in a reply
04-12-2017, 07:35 PM
Post: #3
RE: Just ask your calculator
The quote was from a McGraw Hill publication. Not related to any calculator manual.

Wikis are great, Contribute :)
Find all posts by this user
Quote this message in a reply
04-12-2017, 07:43 PM
Post: #4
RE: Just ask your calculator
Sorry, forgot the 8^)
Find all posts by this user
Quote this message in a reply
04-14-2017, 01:20 AM
Post: #5
RE: Just ask your calculator
(04-12-2017 05:13 PM)KeithB Wrote:  For my HP71 it depends on the flag settings. If you work hard you can get NaN.

On an HP-71B, after TRAP(IVL,2), 0/0 yields NaN, but 4/0 yields Inf. How do you get 4/0 to yield NaN?

<0|ΙΈ|0>
-Joe-
Visit this user's website Find all posts by this user
Quote this message in a reply
04-17-2017, 03:56 PM
Post: #6
RE: Just ask your calculator
Have a bad memory? I thought every /0 yielded NaN.
Find all posts by this user
Quote this message in a reply
04-18-2017, 08:06 AM
Post: #7
RE: Just ask your calculator
Nope. Only 0/0 is undetermined mathematically.

x/0 for real value x!=0 is always +INF or -INF depending on the sign of x.
Find all posts by this user
Quote this message in a reply
04-18-2017, 11:42 AM
Post: #8
RE: Just ask your calculator
(04-18-2017 08:06 AM)grsbanks Wrote:  Only 0/0 is undetermined mathematically. x/0 for real value x!=0 is always +INF or -INF depending on the sign of x.

Could you cite your source, such as at Math-only-Math under Properties of Division, Property 4 is the following Note: In order to divide 6 by 0, we must find a whole number which when multiplied by 0 gives us 6. Clearly, no such number can be obtained. We, therefore, say that division by 0 is not defined.

BEST!
SlideRule
Find all posts by this user
Quote this message in a reply
04-18-2017, 01:10 PM (This post was last modified: 04-18-2017 01:11 PM by pier4r.)
Post: #9
RE: Just ask your calculator
(04-18-2017 08:06 AM)grsbanks Wrote:  Nope. Only 0/0 is undetermined mathematically.

x/0 for real value x!=0 is always +INF or -INF depending on the sign of x.

For the little that I know, this should be valid only with limits. I mean : the divisor (epsilon) approaching to zero in the formula x/epsilon

Wikis are great, Contribute :)
Find all posts by this user
Quote this message in a reply
Post Reply 




User(s) browsing this thread: 1 Guest(s)