please tlg jwb no 3,4 sm 5

Nomor 5 kurang jelas gan ...

Semoga bermanfaat ^_^

3.a
U4=2n²-1=2.16-1=32-1=31
U3=18-1=17
U2=8-1=7
U1=1
3.b
U4=3(n+1)²=3(5)²=3.25=75
U3=3.16=48
U2=3.9=27
U1=3.4=12
4.a
a=0
b=2
Un=0+(n-1)2=2n-2
4.b
a=7
b=2
Un=7+2n-2=5+2n
4.c
a=64
b=3
Un=64+3n-3=61+3n
4.d
a=2
b=7
Un=2+7n-7=7n-5
4.e...............
5....................