Help with exponents!
Question posted below... MEDAL!
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OpenStudy (calculusxy):
\[\huge (x^4)^{-3} \times 2x^4\]
OpenStudy (calculusxy):
@hartnn
hartnn (hartnn):
first term
\(\huge (a^b)^c = a^{bc}\)
hartnn (hartnn):
you subtracted the exponents,
the rule tell us to multiply them :3
OpenStudy (anonymous):
@hartnn agree
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OpenStudy (calculusxy):
Oh my godd
OpenStudy (calculusxy):
I am running our of my mind :\
OpenStudy (calculusxy):
*out
hartnn (hartnn):
\(4 \times (-3) = - (4\times 3) = .. \)
OpenStudy (calculusxy):
\[\huge x^{4 \times (-3)} = x^{-12}\]
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hartnn (hartnn):
yussss
hartnn (hartnn):
now
\(\huge a^b \times a ^c = a^{b+c}\)
hartnn (hartnn):
2 \((x^{-12} \times x^4) = .. ?\)
OpenStudy (calculusxy):
So here's the thing, I don't why we have to combine them... Is it because 2x^4 has two terms: 2 and x^4?
OpenStudy (jhannybean):
theres a common base, \(x\)
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hartnn (hartnn):
2 is a constant, lets throw that out of the process of multiplying 'x's
OpenStudy (calculusxy):
So just to clarify, if we have like 45x^5 then i will just have to take out the 45 and work with the x being the common base with another power right?
hartnn (hartnn):
....with another term of x.
yes.
OpenStudy (calculusxy):
\[\large 2(x^{-8}) = 2x^{-8}\]
OpenStudy (calculusxy):
Is that correct ?
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hartnn (hartnn):
\(2 x^3 \times 45 x^5 = 2\times 45 x^{3+5}\)
hartnn (hartnn):
yes, thats correct :)
hartnn (hartnn):
2/x^8 also "looks" nice
OpenStudy (calculusxy):
My answer is \[\huge \frac{ 2 }{ x^8 }\]
hartnn (hartnn):
\(\huge \checkmark \)
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OpenStudy (calculusxy):
The reason for why I have to put the x^8 to the denominator is because of the exponent of -8 right? The negative exponent tells the base to get to its reciprocal and then the exponent becomes positive?