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If (1+x)^n=c0+c1x+c2x^2+….+cnx^n, find t...

If `(1+x)^n=c_0+c_1x+c_2x^2+….+c_nx^n`, find the value of `c_0-c_2+c_4-….`

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The correct Answer is:
`2^(n/2)cos(npi)/(4)`
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