Asked by Deep
Which term of the geometric sequence 2,-6,18 ....... 162
Answers
Answered by
Reiny
general term of GS is ar^(n-1)
for yours, a = 2, r = -3
general term = 2(-3)^(n-1) = 162
(-3)^(n-1) = 81 , but I know (-3)^4 = 81
n-1 = 4
n = 5 , so 162 is the 5th term
for yours, a = 2, r = -3
general term = 2(-3)^(n-1) = 162
(-3)^(n-1) = 81 , but I know (-3)^4 = 81
n-1 = 4
n = 5 , so 162 is the 5th term
Answered by
Ayush
Reason to write n-1 is equal to 4
Answered by
sakshi
5=n
Answered by
RAJAT DHAKAD
Which term of the geometric sequence 2,-6,18,...... is 162 ?
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