Q.If $(1 + x - 2x^2)^4 = a_0 + a_1 x + a_2 x^2 + \cdots + a_8 x^8$ , then $a_1 + a_3 + a_5 + a_7$ equals

108

120

128

The correct solution involves applying the fundamental concept to derive the final value step by step...

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Q.If (1+x−2x2)4=a0+a1x+a2x2+⋯+a8x8(1 + x - 2x^2)^4 = a_0 + a_1 x + a_2 x^2 + \cdots + a_8 x^8(1+x−2x2)4=a0​+a1​x+a2​x2+⋯+a8​x8, then a1+a3+a5+a7a_1 + a_3 + a_5 + a_7a1​+a3​+a5​+a7​ equals