Help a newbie with a calculation result

09142017, 05:24 PM
Post: #1




Help a newbie with a calculation result
Hi guys. Sorry, I am a pianist, doing math for the sake of selfeducation. SO I am quite stupid in it. I enter the following in my HP Prime: 2^4 and it gives me the result 16, but shouldn't it be positive 16? because 2*2*2*2=16?
Sorry apparently I am just dumb, but please explain. 

09142017, 05:49 PM
(This post was last modified: 09142017 05:51 PM by salvomic.)
Post: #2




RE: Help a newbie with a calculation result
(09142017 05:24 PM)Skfir Wrote: Hi guys. Sorry, I am a pianist, doing math for the sake of selfeducation. SO I am quite stupid in it. I enter the following in my HP Prime: 2^4 and it gives me the result 16, but shouldn't it be positive 16? because 2*2*2*2=16? hi, is a problem of "order of operations" (see here). (2)^4 is 16, instead 2^4 is the same as (2)^4 that's simply 16. 2*2*2*2 is seen with *implicit (), but not the power (2^4)... Salvo ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C  DM42, DM41X  WP34s Prime Soft. Lib 

09142017, 05:50 PM
Post: #3




RE: Help a newbie with a calculation result
The result is correct because of the order of operations. Powers and roots are evaluated
before addition/subtraction and signs, You get the result +16 by entering (2)^4 where parentheses take precedence over the other operations. 

09142017, 05:52 PM
(This post was last modified: 09142017 05:55 PM by DrD.)
Post: #4




RE: Help a newbie with a calculation result
No, you are not dumb. (2)^4 is 16. However you have entered 2^4, which is 1*(2^4), which is 16.
Dale 

09142017, 06:13 PM
Post: #5




RE: Help a newbie with a calculation result
(09142017 05:24 PM)Skfir Wrote: Hi guys. Sorry, I am a pianist, doing math for the sake of selfeducation. SO I am quite stupid in it. I enter the following in my HP Prime: 2^4 and it gives me the result 16, but shouldn't it be positive 16? because 2*2*2*2=16? That result is correct, you have to take note of the parenthesis: 2^4=16, (2)^4=+16. Best, Aries ;) 

09142017, 09:06 PM
Post: #6




RE: Help a newbie with a calculation result
Oh!! Got it!! Thank you guys!!


09152017, 06:08 PM
Post: #7




RE: Help a newbie with a calculation result
You are welcome, Skfir ;)
Best, Aries :) 

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