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U1=3.1+1=3+1=4
U2=3.2+1=6+1=7
U3=3.3+1=9+1=10
1b)
U1=2.1²-1=2-1=1
U2=2.2²-1=8-1=7
U3=2.3²-1=18-1=17
2a).
4=2×1+2
6=2×2+2
8=2×3+2
10=2×4+2
Un=2n+2
2b)
10=11-1
9=11-2
8=11-3
7=11-4
Un=11-n
2c).
2=2¹
4=2²
8=2³
16=2⁴
Un=2ⁿ