摘要: Suppose that X represents the number of black balls in a sample of size 14 drawn from a large urn containing 70 balls. If Var(X) =, then find the number of black balls in the urn
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已知函数f(x)=x-k2+k+2(k∈Z),且f(2)<f(3)
(1)求k的值;
(2)试判断是否存在正数p,使函数g(x)=1-p•f(x)+(2p-1)x在区间[-1,2]上的值域为[-4,
].若存在,求出这个p的值;若不存在,说明理由.
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(1)求k的值;
(2)试判断是否存在正数p,使函数g(x)=1-p•f(x)+(2p-1)x在区间[-1,2]上的值域为[-4,
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