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If one root of the equation ax^2 + bx + ...

If one root of the equation `ax^2 + bx + c = 0` is equal to the `n^(th)` power of the other, then `(ac^n)^(1/(n+1)) + (a^nc)^(1/(n+1)) + b` is equal to

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Let `alpha` be one root of the equation `ax^(2)+bx+c=0`
then other root be `alpha^(n)`
`:.alpha +alpha^(n)=-b/a` ……..i
and `alpha. alpha^(n)=c/a`
`impliesalpha^(n+1)=c/a`
`impliesalpha=(c/a)^(1/(n+1))`
`:.` From Eq. (i) we get
`(c/a)^(1/(n+1))+(c/a)^(n/(n+1))=-b/a`
`implies(c)^(1/(n+1)).a^(-1/(n+1)+1)+(c^(n))^(1/(n+1)).a^(-n/(n+1)+1)+b=0`
`implies1/c^(1/(n+1)).a^(n/(n+1))+(c^(n))^(1/(n+1)).a^(1/(n+1))+b=0`
`=(a^(n)c)^(1/(n+1))+(c^(n)a)^(1/(n+1)+b=0`
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ARIHANT MATHS-THEORY OF EQUATIONS-Exercise (Subjective Type Questions)
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  7. If the equation x^(2)-2px+q=0 has two equal roots, then the equation (...

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  12. Find value of x if x^2+5|x|+6=0

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  14. Solve the system x^(2)-2|x|=0

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  15. If alpha, beta, gamma are the roots of the cubic x^(3)-px^(2)+qx-r=0 ...

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  16. If A(1),A(2),A(3),...,A(n),a(1),a(2),a(3),...a(n),a,b,c in R show that...

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