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t1-α/2和tα/2相等吗
t1-α/2=tα/2
t=2t1t2/t1+t2
t1/2z
t1+t2等于0
t1/2α t1/2β
△t-t1+t2
t1/2f
t1-α=-tα
t1/2e-t
t1/2的意义
δ(t-t1)*δ(t-t2)
t1/2a
t1/2γ
t2(e1/t-1)-t
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