(1-2)(2-3)(3-4)(4-5)····(2003-2004) 咋算

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(1-2)(2-3)(3-4)(4-5)····(2003-2004)咋算(1-2)(2-3)(3-4)(4-5)····(2003-2004)咋算(1-2)(2-3)(3-4)(4-5)····(2

(1-2)(2-3)(3-4)(4-5)····(2003-2004) 咋算
(1-2)(2-3)(3-4)(4-5)····(2003-2004) 咋算

(1-2)(2-3)(3-4)(4-5)····(2003-2004) 咋算
原式=(-1)(-1)(-1).=(-1)^2003=-1