a,x<y
b,x=y+3
c,x=y
d,x=2y
e,x-2=y
Diketahui x= 1+4+7+10… +43 dan y = 2+6+10+14… +46 maka
Jawaban:
x= 1+4+7+10… +43
Un = a+ (n-1) b
43 = 1 + (n-1)3
42 = 3n – 3
45 = 3n
n = 15
Sn = 15/2 (1+43) = 330
x = 330
y = 2+6+10+14… +46
Un = a+ (n-1) b
46 = 2 + (n-1)4
44 = 4n – 4
48 = 4n
n = 12
Sn = 12/2 (2+46) = 288
y = 288
Maka x>y