If $\alpha ,\beta $are the roots of ${x^2} - ax + b = 0$ and if ${\alpha ^n} + {\beta ^n} = {V_n}$, then
If $\alpha ,\beta $are the roots of ${x^2} - ax + b = 0$ and if ${\alpha ^n} + {\beta ^n} = {V_n}$, then
- A
${V_{n + 1}} = a{V_n} + b{V_{n - 1}}$
- B
${V_{n + 1}} = a{V_n} + a{V_{n - 1}}$
- C
${V_{n + 1}} = a{V_n} - b{V_{n - 1}}$
- D
${V_{n + 1}} = a{V_{n - 1}} - b{V_n}$
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