anonymous
  • anonymous
Why does 1/25 = 2^-5 ?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
and can you explain this rule to me?
anonymous
  • anonymous
because 2 is raised to a negative power.
anonymous
  • anonymous
that doesn't really help ..

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anonymous
  • anonymous
thats one of the exponent rules. read your book or use google!
anonymous
  • anonymous
a negative exponent is the reciprocal of the positive so x^-2 = 1/(x^2) = 1/5 and 5^-2 = 1/25
anonymous
  • anonymous
^-----This
anonymous
  • anonymous
yea it a rule, learn it, live it, love it!
anonymous
  • anonymous
thank you very much
anonymous
  • anonymous
You will see it again when learning derivatives!
anonymous
  • anonymous
just try to have fun with it!
anonymous
  • anonymous
i can't. math is the death of me :(
anonymous
  • anonymous
no, it just patterns and rules. Like a language.
anonymous
  • anonymous
wait! wouldn't it equal 5^ -2?
anonymous
  • anonymous
5^ -2 = 1/5^2 = 1/25
anonymous
  • anonymous
is that a yes..
anonymous
  • anonymous
yes
anonymous
  • anonymous
so if the rule was 1/a^m = a^ -m......a and m can switch basically?
anonymous
  • anonymous
let me be clear x^-b = 1/(x^b), yes?
anonymous
  • anonymous
so like 1/25 = 1/5^2 = 5^-2 WHICH IS ALSO 2^ -5 so the "a" and "m" switched
anonymous
  • anonymous
yes...
anonymous
  • anonymous
but am i right...what i said?
anonymous
  • anonymous
clear now? Thats the rule, among many :)
anonymous
  • anonymous
please respond to what i said before...
anonymous
  • anonymous
about a and m switching ?? lemme look at it.
anonymous
  • anonymous
can the two values switch like that....like 5^ -2 = 2^ -5
anonymous
  • anonymous
am i right to say that
anonymous
  • anonymous
wait what?
anonymous
  • anonymous
"1/25 = 1/5^2 = 5^-2 WHICH IS ALSO 2^ -5 " this is not true 2^-5 = 1/( 2^5) = 1/32- I misstyped.
anonymous
  • anonymous
okay. do u mind giving me a few of these to practice...like quizzing me i guess lol
anonymous
  • anonymous
sure 3^-3
anonymous
  • anonymous
ummm oh god
anonymous
  • anonymous
lets see..
anonymous
  • anonymous
1/3^3
anonymous
  • anonymous
ugh im wrong
anonymous
  • anonymous
so far so good- and what is 1/(3^3)?
anonymous
  • anonymous
that would be 3^-3
anonymous
  • anonymous
yes, thats true too but what is 3^3?
anonymous
  • anonymous
27
anonymous
  • anonymous
so 1/(3^3) = 1/27 right?
anonymous
  • anonymous
can u give me one where a and m are different numbers
anonymous
  • anonymous
2^-3
anonymous
  • anonymous
okay so this would be 1/2^3
anonymous
  • anonymous
so 1/8
anonymous
  • anonymous
:-)
anonymous
  • anonymous
yes! so you seem to understand.
anonymous
  • anonymous
can u do one with very big numbers? well like somewhere in the 200s-300s?
anonymous
  • anonymous
sure 222^-300
anonymous
  • anonymous
uh oh.... umm lemme think
anonymous
  • anonymous
1/222^300
anonymous
  • anonymous
okay i think i got this now ! just gotta memorize that rule! :D
anonymous
  • anonymous
are you gonna be online bc i might have more questions :)
anonymous
  • anonymous
you might want a calculator at this point, The rule x^-n = 1/(x^n) is true for ALL number
anonymous
  • anonymous
I will be around until Im not :)
anonymous
  • anonymous
we are not allowed to use calculators on our quiz :(
anonymous
  • anonymous
yea so 222^-300 might not be on the quiz :P btw the answer is : 1/80517880668393229147886068496149401306972582290411328168978510994785579115588583551827976204875447471474879862267202705113127441091878902354853813041890222152198455342144439084242078428238138714265508683035791505554760104867426467157715278054403172295031898472730484002817659144331717312161700756934610875579137993642195693033512692240606656314618045823043091894260503678798685779973005364739112564184555335918720320643432850355542239025011335644126445607944039212224942030284232383674702362906793619267527992062005620717473752544451951685766644998888627609736993334783701457851056538472011058453524224265800042617872532780902329250444294802910839828000675334422137717517355426310014485465179583860965376
anonymous
  • anonymous
study hard.
anonymous
  • anonymous
oh my goodness. are you like a math teacher or something. you are so good at this stuff
anonymous
  • anonymous
no, Im a student, like you.
anonymous
  • anonymous
lol i am a junior in high school and i still do not understand this stuff
anonymous
  • anonymous
practice, practice, practice.
anonymous
  • anonymous
ugh. i hate math so much. do you know much about logs
anonymous
  • anonymous
some what is the deal?
anonymous
  • anonymous
hold on give me a minute
anonymous
  • anonymous
you should open another question- there a lot of smart people here.
anonymous
  • anonymous
okay i will. thank you for all your help! hope to talk to you more sometime on the webbiste! :) - Olivia
anonymous
  • anonymous
sure, I will keep an eye out for your questions :)

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