若数列【an】满足a1等于1,An+1=2an+3n,则数列的项A5
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若数列【an】满足a1等于1,An+1=2an+3n,则数列的项A5
若数列【an】满足a1等于1,An+1=2an+3n,则数列的项A5
若数列【an】满足a1等于1,An+1=2an+3n,则数列的项A5
an+1=2an+3n
∴a2=2+3=5
a3=2*5+3*3=19
a4=19*2+3*4=1=50
a5=50*2+3*5=115
∵an+1=2an+3n
∴a2=a1+1=2a1+3×1=5
a3=a2+1=2a2+3×2=16
a4=a3+1=2a3+3×3=41
a5=a4+1=2a4+3×4=94
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