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If (1+2x^2)^6=1+a1=a2x^2a3x^3++a(12)x^(1...

If `(1+2x^2)^6=1+a_1=a_2x^2a_3x^3++a_(12)x^(12)` , then the value of expression `a_2+a_4+a_6++a_(12)` is 32 2. 31 3. 63 4. 64

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