-1/2
-1/3
1/4
2
3
Correct answer is B
a, ar, ar2, ar3, ar4, ar5
6th term = ar5 = −227
1st term = a = 18
=> ar5
= 18r5 =−227
r5 = −227∗18
→ −127∗9
r5 = −1243
r = 5√[−1243]
r = −13
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