If `(1+x+2x^2)^20=a_0 + a_1x+a_2x^2+....................+a_40x^40` then `a_0+a_2+a_4+.............+a_38` is

If (1 +x+x^2)^25 = a_0 + a_1x+ a_2x^2 +..... + a_50.x^50 then a_0 + a_2 + a_4 + ... + a_50 is :

If (1 +x+x^2)^25 = a_0 + a_1x+ a_2x^2 +..... + a_50.x^50 then a_0 + a_2 + a_4 + ... + a_50 is :

If (1+x+x^2)^n = a_0+a_1x+a_2x_2 +..............+a_(2n)x^(2n) then the value of a_1+a_4+a_7+.........

If (1+x+2x^2)^20 = a_0+a_1x+a_2x^2+. . . +a_40x^40 then a_1+a_3+a_5+ . . . +a_37=

If (1 - x + x^2)^n = a_0 + a_1 x + a_2x^2 + ..... + a_(2n)x^(2n) then a_0 + a_2 + a_4 + ... + a_(2n) equals

If (1+x+x^2+x^3)^100=a_0+a_1x+a_2x^2+.......+a_300x^300, then

let f(x)=a_0+a_1x^2+a_2x^4+............a_nx^(2n) where 0< a_0 < a_1 < a_3 ............< a_n then f(x) has

If (1 - x + x^2)^n = a_0 + a_1x + a_2x^2 +...+ a_(2n) x^(2n) then a_0 + a_2 + a_4 +...+ a_(2n) is equal to

If (1 + 3x - 2x^2)^10 = a_0 + a_1x + a_2x^2 +…..+a_20 x^20 thn prove that a_0 + a_2 +a_4+ …..+ a_20 = 2^9+ 2^19

If (1-x+x^2)^n=a_0+a_1x+a_2x^2+ .........+a_(2n)x^(2n),\ find the value of a_0+a_2+a_4+........+a_(2n)dot