watchmath
  • watchmath
Find all solutions of \[x^{13}+7x^3-8=0\]
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Akshay_Budhkar
  • Akshay_Budhkar
x=1 is a clear solution
UnkleRhaukus
  • UnkleRhaukus
how many solutions are there?
Zarkon
  • Zarkon
real solutions?

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More answers

watchmath
  • watchmath
yes real
JamesJ
  • JamesJ
that's better.
Zarkon
  • Zarkon
\[x^{13}+7x^3-8\] is an increasing function
Akshay_Budhkar
  • Akshay_Budhkar
yes so we have just 1 real solution x=1
Zarkon
  • Zarkon
correct
anonymous
  • anonymous
\[p(x)=x^{13}-7x^3-8\] only once sign changes so there is a positive root or no positive root \[p(-x)=-x^{13}-7x^3-8\] there is no sign changes so it has no negative root we know that x=1 is a root and it is positive so all the rest roots are complex..

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