已知数列{AN]是递增等差数列,A3+A4=24,A2*A5=108;数列{BN}的前N项呵是TN,且TN+1/2BN=
1个回答
A2+A5=A3+A4=24,A2*A5=108
A2=6 A5=18
AN=4N-2
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