1．In the binomial expansion of $$( 1 - 8 x ) ^ { p } \quad | x | < \frac { 1 } { 8 }$$ where \(p\) is a positive constant，
－the sum of the coefficient of \(x\) and the coefficient of \(x ^ { 2 }\) is equal to the coefficient of \(x ^ { 3 }\)
－the coefficient of \(x ^ { 2 }\) is positive
Determine the value of \(p\) ．
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