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The existence of positive solutions for the following nonlineary nth-oreder boundary value problem was studied. u^(n)(t) +h(t)f(t,u(t)) =0 0 〈 t 〈 1, u(O) = ∫1 0u(t)dα(t),u(1) = ∫1 0u(t)dβ(t) u'(O)=……u^(n-3)(0) = u^(n-2)(0) = 0 Whereh ∈ C(O,1) ∩L(O,1)