the energy required for the following process is 1.96*10⁴ kj/mol

Li_(g)------>Li_(g)⁺³ + 3e^-

if the IE₁ of Li is 520 kj/mol what is the 2^nd IE

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Sum of series 2[n/2] ! [n/2]!/ n! [2Co-2C2+3C2....+[-1]^n[n+1]2Cn] where n is an even positive integer. Kindly provide solution of this question and how to generalise this. How do we know that which expansion will give this?

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