If `alpha and beta` are the roots of the equation `x^2-2x+4 =0` Then `2^(n+1) cos\ (npi)/3`is equal to

If alpha and beta are the roots of the equation x^(2)-2x+4=0, then alpha^(9)+beta^(9) is equal to

If alpha" and "beta are the roots of the equation x^(2)+3x-4=0 , then (1)/(alpha)+(1)/(beta) is equal to

If alpha and beta are the roots of the equations x^2-p(x+1)-c=0 , then (alpha+1)(beta+1)_ is equal to:

If alpha and beta are the roots of equation x^2-4x+1=0 , find alpha^2+beta^2

If alpha and beta are the roots of the equation 4x^(2)+3x+7=0, then (1)/(alpha)+(1)/(beta)=

If alpha and beta are the roots of the equation x ^(2) + 3x - 4 = 0 , then (1)/(alpha ) + (1)/(beta) is equal to

If alpha and beta are the roots of the equation x^(2) - 2x + 4 = 0 , then what is the value of alpha^(3) + beta^(3) ?

If alpha and beta are the roots of equation x^2-4x+1=0 , find alpha^3+beta^3