marigirl
  • marigirl
Could you please explain mathematically what actually happens to the absolute value below
Mathematics
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marigirl
  • marigirl
Could you please explain mathematically what actually happens to the absolute value below
Mathematics
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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marigirl
  • marigirl
\[\ln \left| 2k^3-1 \right|=7.5\]
marigirl
  • marigirl
Then I would go \[\left| 2k^3-1 \right|=e^(7.5)\]
marigirl
  • marigirl
what will happen to the absolute function value now?

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IrishBoy123
  • IrishBoy123
try\[2k^3−1=\pm e^{7.5}\]
marigirl
  • marigirl
My question was to solve for k which the value is + or - 9.67 how do we 'get rid' of an absolute value function, or how do we balance an absolute value function in an equation Since absolute value function only look at positive values, I am a little confused with your response @IrishBoy123
IrishBoy123
  • IrishBoy123
let's say |x| = 3, then we can conclude that x = 3 OR x = -3 yes?
IrishBoy123
  • IrishBoy123
ie, in that example i give, we conclude \[x = \pm3\]
IrishBoy123
  • IrishBoy123
so if \(|x|=e^{7.5}\), you must consider \(x= \pm e^{7.5}\)
IrishBoy123
  • IrishBoy123
you should get two answers \[\sqrt[3]{\frac{1 \pm e^{7.5}}{2}}\]
marigirl
  • marigirl
oh yea it makes sense now, I got k=9.67 and k=-9.66 Thanks heaps! I really appreciate it
IrishBoy123
  • IrishBoy123
\(\checkmark\)

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