Nomor 1
u5 = a + 4b = 21
u10 = a + 9b = 41 —
-5b = -20
b = 4
U5 = a + 4b
21 = a + 4(4)
21 = a + 16
a = 21 - 16
a = 5
Un = a+(n-1)b
U50 = 5 + (50-1)4
U50 = 5 + 49(4)
U50 = 5 + 196
U50 = 201
Nomor 2
Diket : s = 1/250.000
jp = 8 cm
Ditanya : js..?
Jawab :
Js = jp : s
Js = 8 : 1/250.000
Js = 8 × 250.000
Js = 2.000.000 cm
Js = 20 km
#strawbeelly
nomor 1
U5 = a+(n-1)b = a+(5-1)b = a+4b = 21
U10 = a+(n-1)b = a+(10-1)b = a+9b = 41
_________(-)
a+4(4)=21
a+16=21
a=21-16
a=5
atau
a+9(4)=41
a+36=41
a=41-36
dit = U50?
Un = 5+(n-1)4
Un = 5+4n-4
Un = 4n+1
U50 = 4(50)+1
U50 = 200+1
U50 = 5+(50-1)4
U50 = 5+(49)4
U50 = 5+196
nomor 2
Js = JP ÷ skala
Js = 8 ÷ 1/250.000
Js = 8 × 250.000/1
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Verified answer
Nomor 1
u5 = a + 4b = 21
u10 = a + 9b = 41 —
-5b = -20
b = 4
U5 = a + 4b
21 = a + 4(4)
21 = a + 16
a = 21 - 16
a = 5
Un = a+(n-1)b
U50 = 5 + (50-1)4
U50 = 5 + 49(4)
U50 = 5 + 196
U50 = 201
Nomor 2
Diket : s = 1/250.000
jp = 8 cm
Ditanya : js..?
Jawab :
Js = jp : s
Js = 8 : 1/250.000
Js = 8 × 250.000
Js = 2.000.000 cm
Js = 20 km
#strawbeelly
nomor 1
U5 = a+(n-1)b = a+(5-1)b = a+4b = 21
U10 = a+(n-1)b = a+(10-1)b = a+9b = 41
_________(-)
-5b = -20
b = 4
a+4(4)=21
a+16=21
a=21-16
a=5
atau
a+9(4)=41
a+36=41
a=41-36
a=5
dit = U50?
Un = a+(n-1)b
Un = 5+(n-1)4
Un = 5+4n-4
Un = 4n+1
U50 = 4(50)+1
U50 = 200+1
U50 = 201
atau
U50 = 5+(50-1)4
U50 = 5+(49)4
U50 = 5+196
U50 = 201
nomor 2
Js = JP ÷ skala
Js = 8 ÷ 1/250.000
Js = 8 × 250.000/1
Js = 2.000.000 cm
Js = 20 km