Question

hello, Amistre64?

Answer 1

hi :)

Answer 2

o.O

Answer 3

Hey, you are still here! And it's me with these blasted exponents again! What are the rules for negative exponents?

Answer 4

Like 2^-3/4, what is that answer?

Answer 5

How do you write it out to figure the answer no matter what the exponents are?

Answer 6

\[a^{-b}=\frac{1}{a^{b}} \]

Answer 7

ok, so 2^-3/4 is 1/2^3/4? What is the value of that then?

Answer 8

\[2^{-3/4} \iff \frac{1}{2^{3/4}}\]

Answer 9

you can split up the fraction. (2^3)^(1/4)=8^(1/4)
1/(8^(1/4))

Answer 10

ok, so are the answers ever negative when you have a negative exponent? It looks to me like they are always positive!

Answer 11

sure -2^-3=-1/8

Answer 12

but thaqt is where the base number is negative. what about the exponent being negative?

Answer 13

programs dont like to see a ^-exp

Answer 14

a negative exponents is a symbol for inverse; and the inverse of a rational number is just flipping it over

Answer 15

i am very very confused. How can -2^-3 be -1/8

Answer 16

(-2)^-3=1/(-2)^3=1/-8=-1/8

Answer 17

Ah! I see! Ok...this is so confusing I am scared

Answer 18

\[-2^{-x} \iff \frac{-1}{2^x}\]
\[{-1\over 2^3} = {-1\over8}\]

Answer 19

its not so bad after you've practiced enough just keep doing problems

Answer 20

so does 1/1^1/2 equal 1?

Answer 21

sqrt(1)=1 yep

Answer 22

\[1^{anything}=1\]

Answer 23

anything^0=1

Answer 24

ok, but what if it is 1/3^1/2? What the answer then?

Answer 25

0^0=1 is debatable though I think

Answer 26

\[\sqrt{1/3}\]

Answer 27

\[{1\over\sqrt{3}} \iff {\sqrt{3}\over3}\]

Answer 28

wait a minute, Amistre64, why is that sqrt of 1/3? Isn't it just 1/sqrt3?

Answer 29

same thing, sqrt(1)=1

Answer 30

\[\sqrt{{1\over3}}\iff {\sqrt{1}\over\sqrt{3}}\iff \frac{1}{\sqrt{3}}\iff \frac{\sqrt{3}}{3}\]

Answer 31

My problem in particular is the following: -1-2(1)^1/2. That's what I cannot figure out.

Answer 32

that looks to be -3

Answer 33

Wait TYPO!!! sorry! Do Not Reply to that. It's -1-2(1)^-1/2

Answer 34

\[-1-2(1^{1/2})\]

Answer 35

\[-1-2(1^{-1/2})\]

Answer 36

\[-1-2(1^{-1/2}) \rightarrow 1^{anything}=1\]
\[-1-2(1) \iff -1-2=-3\]

Answer 37

ok, but what if that said -1-2(3)^-1/2

Answer 38

What does 3^-1/2 equal

Answer 39

oh wait! That =1/sqrt3, right?

Answer 40

yes

Answer 41

tell me; what does an exponent mean?

Answer 42

ok, so then what if it is 3^-3/4? Would that be 1/4throot of 27?

Answer 43

I do not know how to define an exponent. Sorry.

Answer 44

it is simply a way to write large numbers; it tells us how many times we multiply to get the number it represents

Answer 45

do you know what multiplication is?

Answer 46

That i know!

Answer 47

multiplication is a way of writing large numbers; and it tells us how many times we add the number to itslef

Answer 48

2+2+2+2+2+2 = ? = 6(2) right?

Answer 49

yes

Answer 50

2.2.2.2.2.2 = ? = 2^6

Answer 51

that is all an exponent amounts to

Answer 52

tell me: if a positive exponent means to multiply; what does a negative exponent tell us?

Answer 53

you know that problem up there, the one I said I needed to figure out? They are saying that the answer to - -2(1)^-1/2 is=-1 not -3.

Answer 54

then you prolly mis notated it

Answer 55

or the program could be in error :)

Answer 56

Sorry typo again. It's -1-2(1)^-1/2 Let me try to use the equation thing.

Answer 57

a negative exponent indicates division; since its the opposite of multiplication right?

Answer 58

\[-1-2(1)^{-1/2}\]

Answer 59

2^-3 means:

((1/2)/2)/2 = 1/8

Answer 60

\[-1-2(1)^{-1/2} = -1-2(1) = -1-2 = -3\]

Answer 61

ok! This is sooooo hard. I just can't get a grasp on it. I;m sorry. I'm so frustrated I could cry! I have been wroking on this single problem for 6 hours and I cannot get it right.

Answer 62

you know what we do when that happens? we say 'next' and move on lol

Answer 63

one answer to one math problem aint gonna end the world dear :)

Answer 64

But all these problems have these exponents in them and I cannot get any of them right!

Answer 65

are they in a book? or on the computer?

Answer 66

I mean ALL of them have exponents! And that's alot of wrong answers, not just one!

Answer 67

They are on my MathXL program for my class

Answer 68

do you know how to get a screen shot?

Answer 69

No, I dont' even know what that is.

Answer 70

look near your keys on the keyboard that you never use; pause, break, scroll lock.... and tell me if you see a 'PrtScrn' key

Answer 71

yes I do. What does it do?

Answer 72

its the 'print screen' key; it takes a picture of whatever is on your screen

Answer 73

ok, so then what do I do with it?

Answer 74

do you have a paint program on your computer? you on windows?

Answer 75

I am on windows 7, but I don't know how to use paint or anything like that. Not only do I suck at math I suck at computers and most things!

Answer 76

click: START -> PROGRAMS -> ACCESSORIES -> PAINT

Answer 77

ok, then what do I do when I open paint?

Answer 78

you tell me that youve opened it lol

Answer 79

oh you are a funny one!

Answer 80

you ever copy and paste anything in a text document?

Answer 81

I opened it but it took up so much of the screen I cannot see this one. I have copied and pasted. How do I do that aFTE I take a creen shot of the screen?

Answer 82

That wierd word is after

Answer 83

in paint, just rightclick the mouse and pick 'paste'

or

hold down your 'ctrl' key and press the 'v' key

Answer 84

when i click screen shot, where si the picture of the screen saved?

Answer 85

THAT weird word is "is" not si.

Answer 86

its saved in memory;

the steps are:

1; press the 'prtscrn' key

2; open paint

3; hold down the 'ctrl' key and press the 'v' key

Answer 87

ok let me try that. If I blow up my computer...; )

Answer 88

...... blame the kid lol

Answer 89

i never thought I'd be laughing over this calculus today...thanks! Let me try that!

Answer 90

ok, I have it on the paint screen, now what do I do with it?

Answer 91

click: File.

click: Save

in the box that opens press 'desktop' to save it on your desktop

then you can attach it to the post inhere with the 'attach file' button at the bottom of the screen

Answer 92

ok, but you are sure asking alot of a dummy, buddy. ; )

Answer 93

:) baby steps

Answer 94

Hey, I just got an achievement award for that! I like this place!

Answer 95

lol..you did it yay!!

Answer 96

is this the problem your working on?