Jawab:
603
Penjelasan dengan langkah-langkah:
U3 = 14
U7 = 26
S18? ....
U3= 14 = a+2b
U7= 26 = a+6b
eliminasi.
-12 = -4b
b = 3
a=> 14=a+2(3)
14=a+6
a= 8
S18 = n/2 (2a+(n-1)b)
18/2 (2(8) + (18-1) (3)
9 (16+51)
9 (67)
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Jawab:
603
Penjelasan dengan langkah-langkah:
U3 = 14
U7 = 26
S18? ....
U3= 14 = a+2b
U7= 26 = a+6b
eliminasi.
-12 = -4b
b = 3
a=> 14=a+2(3)
14=a+6
a= 8
S18 = n/2 (2a+(n-1)b)
18/2 (2(8) + (18-1) (3)
9 (16+51)
9 (67)
603