1.

(1+x^2/(2!)+x^4/(4!)+....oo)^2 =

Answer»

`1+(2X^2)/(2!)+(2^3x^4)/(4!)+(2^5x^6)/(6!)+....OO`
`1+(2x^2)/(2!)+(2^2x^4)/(4!)+(2^3x^6)/(6!)+....oo`
`1+(x^2)/(1!)+(2x^2)/(2!)+(3x^3)/(3!)+....oo`
`e^(2x) +e^(-2x)`

ANSWER :A


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