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

(1+2x+3x^(2))^(10)=a_(0)+a_(1)x+a_(2)x^(2)+...+a_(20)x^(20), then a_(1) equals 10 b.20 c.210 d.none of these

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+x^(4))^(5)=a_(o)+a_(1)+a_(2)x^(2)+......a_(20)x^(20) then a_(0)+a_(1)+a_(2)+......a_(20) is

If (1+x+x^(2))^(25)=a_(0)+a_(1)x+a_(2)x^(2)+...+a_(50).x^(50) , then a_(0)+a_(2)+a_(4)+....+a_(50) is

If (1+x-3x^(2))^(10)=1+a_(1)x+a_(2)x^(2)+....+a_(20)x^(20),"then "a_(2)+a_(4)+a_(6)+...+a_(20) is equal to a) (3^(10)+1)/(2) b) (3^(9)+1)/(2) c) (3^(10)-1)/(2) d) (3^(9)-1)/(2)

Let (1+x+2x^(2))^(20) = a_(0)+a_(1)x+a_(2)x^(2)+...+a_(40)x^(40) then a_(1)+a_(3)+a_(5)+...+a_(39) is equal to

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

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