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f(x)＝x(x－c)2在x＝2处有极大值，那么常数c的值是
f(x)＝x(x－c)2在x＝2处有极大值，则常数c的值为________．
f(x)＝x(x－c)2在x＝2处有极大值，则常数c的值为_________．
