Question

Ada yang tahu jawabannya gak?
Besok dikumpulin.

Answer 1

1. 4,5,6,7
un= a+(n-1)b
=4+(n-1)1
=4+n-1
=n+3
U1=n+3
=1+3=4
u8 = n+3
=8+3=11
u120 = n+3
=120+3=123
2. 21,23,25,27
un = a+(n-1)b
=21+(n-1)2
=21+2n-2
=2n+19
u1 = 2n+19
= 2.1+19
=21
u8= 2n+19
=2.8+19
=16+19= 35
u120= 2n+19
= 2.120+19
=240+19= 259
3. 16,20,24,28
un= a+(n-1)b
=16+(n-1)4
=16+4n-4
=4n+12
u1= 4n+12
=4.1+12
=4+12=16
u8 = 4n+12
=4.8+12
=32+12= 44
u120= 4n+12
=4.120+12
=480+12= 492
4. 100,96,92,88
un= a+(n-1)b
=100+(n-1)-4
=100-4n+4
=-4n+104
u1= -4n+104
= -4.1+104
=-4+104= 100
u8= -4n+104
=-4.8+104
=-32+104
=72
u120= -4n+104
=-4.120+104
-480+104
=-376