The value of (x+y)(x-y)+ 1 2! (x+y)(x-y) (x^2+y^2 )+ 1 3! (x+y)(x-y) (x^4+y^4+x^2y^2 )+ , is

JEE Main Mathematics question

The value of , is

Answer: (A)

The factors give for the term (which has the factor ). The sum is

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Question ID VK-022001