已知数列{an}满足2a(n+1)=an+a(n+2)(n∈N*),且a3=10,S6=72.若bn=(1/2)an-30,求数列bn的前n项和的最小值已知数列{an}满足2a(n+1)=an+a(n+2)(n属于N*),且a3=10,S6=72.若bn=(1/2)an-30,求数列{bn}的前n项和的最小值.
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