Tuliskan n suku berisan aritmatika jika diketetahui A. a1=3, b=4, n=5 B. a1=17, b=-2, n=6 C. a1=8, b= 11, n=5 D. a1=0, b=-6, n=6 E. a1=7, b=13, n=7

a) a = 3
b = 4
Un = a + ( n - 1 ) b
U5 = a + ( 5 - 1 ) b
U5 = a + 4b
= 3 + 4(4)
= 3 + 16
= 19

b) a = 17
b = - 2
U6 = a + 5b
= 17 + 5(-2)
= 17 - 10
= 7

c) a = 8
b = 11
U5 = a + 4b
= 8 + 4(11)
= 8 + 44
= 52

d) a = 0
b = - 6
U6 = a + 5b
= 0 + 5(-6)
= - 30

e) a = 7
b = 13
U7 = a + 6b
= 7 + 6(13)
= 7 + 78
= 85