If one of the roots of the equation $x^2+px+q=0$ is equal to the square of the other,then:

  • A
    $p(q^2-3p)=q(p-1)$
  • B
    $p(3p-q^2)=p(p+1)$
  • C
    $p(3q-p^2)=q(q-1)$
  • D
    $p(3q-p^2)=q(q+1)$

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Let $\alpha$ and $\beta$ be the roots of $x^2-x-1=0$,with $\alpha>\beta$. For all positive integers $n$,define $a_n=\frac{\alpha^n-\beta^n}{\alpha-\beta}, n \geq 1$ and $b_1=1$ and $b_n=a_{n-1}+a_{n+1}, n \geq 2$. Then which of the following options is/are correct?
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$(4)$ $b_n = \alpha^n+\beta^n$ for all $n \geq 1$

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