[" 17.If "y=..." and and "(1-x^(2))(((x))/(a))^(2)=A_(x)^(2)" ,then "A" - "],[[" (A) "m," (B) "-m," (C) "m^(2)," (D) "-m^(2)]]

if (5x^(2) +2)/(x^(3)+x)=(A_(1))/(x)+(A_(2)x+A_(3))/(x^(2)+1), then (A_(1), A_(2), A_(3))=

if (5x^(2) +2)/(x^(3)+x)=(A_(1))/(x)+(A_(2)x+A_(3))/(x^(2)+1), then (A_(1), A_(2), A_(3))=

If (x^(2)+x)/(1-x)=a_(1)x+a_(2)x^(2)+............oo,|X|< then

If (1+x-2x^(2))^(6) = 1 + a_(1)x+a_(2)x^(2) + "……" + a_(12)x^(12) , then find the value of a_(2) + a_(4) +a_(6)+ "……" + a_(12) .

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

( 1 + x + x^(2))^(n) = a_(0) + a_(1) x + a_(2) x^(2) + …+ a_(2n) x^(2n) , then a_(0) + a_(1) + a_(2) + a_(3) - a_(4) + … a_(2n) = .

Given that (1+x+x^(2))^(n)=a_(0)+a_(1)x+a_(2)x^(2)+......+a_(2n)x^(2n) , find the values of a_(0)^(2)-a_(1)^(2)+a_(2)^(2)-a_(3)^(2)+....+a_(2n)^(2)

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) =

(1+x-2x^(2))^(6)=1+a_(1),x+a_(2)x^(2)+….+a_(12)^(12) then the value of a_(2) +a_(4)+a_(6)+….+a_(12)=………

If (1+x-2 x^(2))^(6)=1+a_(1) x+a_(z) x^(2)+l .. .+a_(12) x^(12) then a_(2)+a_(4)+..+a_(12) =