" 28."(1+2x+3x^(2))^(10)=a_(0)+a_(1)x+a_(2)x^(2)+..............+a_(20)x^(20)rArr(a_(2))/(a_(1))=

If (2+x+x^(2))^(10)=a_(0)+a_(1)x+a_(2)x^(2)+......+a_(20)x^(20) then (a_(1)-a_(0))/(a_(20))=

If (1 + x - 3x^(2))^(10) = a_(0) + a_(1)x + a_(2)x^(2) + ....... + a_(20)x^(20) , then a_(2) + a_(4) + a_(6) + ……. + a_(20) =

If (1+2x+3x^(2) )^(10) = a_(0) + a_(1) x + a_(2) x^(2) +…+a_(20) x^(20) , then

If (1+x+x^(2)+x^(3))^(100)=a_(0)+a_(1)+a_(2)x^(2)+......+a_(300)x^(300) then

If (1+2x+3x^(2))^(10)=a_(0)+a_(1)x+a_(2)x^(2)+a_(3)x^(3)+ . . .+a_(20)x^(20), then

If (1+2x+3x^(2))^(10)=a_(0)+a_(1)x+a_(2)x^(2)+a_(3)x^(3)+ . . .+a_(20)x^(20), then

If (1+x+x^(2))^(n)=a_(0)+a_(1)x+a_(2)x_(2)+............+a_(2n)x^(2n) then the value of a_(2)+a_(5)+a_(8)+.......

If (2x^(2) - x - 1)^(5) = a_(0) + a_(1)x + a_(2)x^(2) + ....... + a_(10)x^(10) then, a_(2) + a_(4) + a_(6) + a_(8) + a_(10) =

If (1+x+x^(2))^(n)=a_(0)+a_(1)x+a_(2)x_(2)+............+a_(2n)x^(2n) then the value of a_(1)+a_(4)+a_(7)+.......