is3535
  • is3535
help
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!
is3535
  • is3535
@phi @partyqueen
is3535
  • is3535
@paki
is3535
  • is3535
|dw:1441998613082:dw|

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More answers

is3535
  • is3535
@pinklion23
Nnesha
  • Nnesha
when we multiply same bases we should `add` exponents \[\huge\rm x^m \times x^n=x^{m+n}\] and when we divide same base , `subtract` their exponents \[\huge\rm \frac{ x^m }{ x^n }=x^{m-n}\]
Nnesha
  • Nnesha
so \[7^{-3} \times 7^{9}=?\]
is3535
  • is3535
|dw:1441998736665:dw|
is3535
  • is3535
7^-14
Nnesha
  • Nnesha
hmm how did you get *negative * 14
is3535
  • is3535
i just guess
Nnesha
  • Nnesha
don't guess it's easy when multiply same bases we should `add` their exponents so \[7^{-3} \times 7^{9}=\rm what ?\]
pinklion23
  • pinklion23
lol
pinklion23
  • pinklion23
-3+9=9-3
is3535
  • is3535
117649
Nnesha
  • Nnesha
well don't use calculator
Nnesha
  • Nnesha
here is an example \[\huge\rm 2^2 \times 2^3 = 2^{2+3} = 2^5\] base would stay the same \[\large\rm 7^{-3} \times 7^9=7^{-3+9}=7^?\]
is3535
  • is3535
2
Nnesha
  • Nnesha
mind telling how u got 2 ?
is3535
  • is3535
there 2 number 3 and 9
is3535
  • is3535
it so hard
Nnesha
  • Nnesha
i said just `add` exponents -3 and 9 are exponents 9-3= ??
is3535
  • is3535
9-3 = 6
Nnesha
  • Nnesha
yes right so numerator would be 7^6 \[\huge\rm \frac{ 7^6 }{ 7^{-8} }\] 2nd exponent rule when we divide same base we should `subtract` their exponents here is an example \[\huge\rm \frac{ 2^4 }{ 2^{-3} }=2^{4-(-3)}\]
is3535
  • is3535
2^4-(-3) you add
Nnesha
  • Nnesha
we would bec 2nd exponent is negative that would makes addition
is3535
  • is3535
4^2
Nnesha
  • Nnesha
what is 4^2 ?
is3535
  • is3535
|dw:1441999674369:dw|
Nnesha
  • Nnesha
here is an example \[\huge\rm \frac{ 2^4 }{ 2^{-3} }=2^{4-(-3)}=2^{4+3}=2^7\] basically we are subtracting 4 from -3 4-(-3) but bec 3 is negative that would makes positive 3
Nnesha
  • Nnesha
what about 4^2 ? \[\huge\rm \frac{ 7^6 }{ 7^{-8} } = ?\]
is3535
  • is3535
i think it A OR B
Nnesha
  • Nnesha
i have no idea what A or B ...
is3535
  • is3535
|dw:1441999981329:dw|
Nnesha
  • Nnesha
look at the example then solve this \[\huge\rm \frac{ 7^6 }{ 7^{-8} } = ?\]
is3535
  • is3535
ok
Nnesha
  • Nnesha
here is an example \[\huge\rm \frac{ 2^4 }{ 2^{-3} }=2^{4-(-3)}=2^{4+3}=2^7\] in this example base is 2
is3535
  • is3535
i said 2^7
Nnesha
  • Nnesha
you never said that anyways that's an example now solve ur question which is \[\huge\rm \frac{ 7^6 }{ 7^{-8} } = ?\]
Nnesha
  • Nnesha
move the exponent from denominator to top when you do that sign of the denominator exponent would change
is3535
  • is3535
ok ty
is3535
  • is3535
it was worng
Nnesha
  • Nnesha
which one ?
Nnesha
  • Nnesha
what did you get ?
Nnesha
  • Nnesha
i didn't give you the answer you didn't tell me which one you get
is3535
  • is3535
it was 7^14

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