U0=0
Un+1=2n+Un
Vn=n²
U0+0
U1=2*0+U0=0
U2=2*1+U1=2
U3=2*2+U2=4+2=6
U4=3*2+U3=6+6=12
V0=0²=0
V1=1²=1
V2=2²=4
V3=3²=9
V4=4²=16
On remarque que Un<=Vn
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Verified answer
U0=0
Un+1=2n+Un
Vn=n²
U0+0
U1=2*0+U0=0
U2=2*1+U1=2
U3=2*2+U2=4+2=6
U4=3*2+U3=6+6=12
V0=0²=0
V1=1²=1
V2=2²=4
V3=3²=9
V4=4²=16
On remarque que Un<=Vn