Answer:
393, 216
Step-by-step explanation:
an = a1 (r)^n-1
a18 = 3 (2)^18-1
a18 = 3 (2)^17
a18 = 3 (131072)
a18 = 393216
393,216
the common difference is 2 or x2
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Answers & Comments
Answer:
393, 216
Step-by-step explanation:
an = a1 (r)^n-1
a18 = 3 (2)^18-1
a18 = 3 (2)^17
a18 = 3 (131072)
a18 = 393216
a18 = 512 (1/2)^18-1
a18 = 512 (1/2)^17
a18 = 512 (1/131072)
a18 = 1/256
Answer:
393,216
Step-by-step explanation:
the common difference is 2 or x2