3,6,12,24,48 ....find the nth term
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Answer:
Step-by-step explanation:
See the terms.
3= 3* 2^0
6=3*2^1
12=3*2^2
24=3*2^3
48=3*2^4
..
..
Tn=3*2^(n-1)
Clearly it’s Geometric series so
Sn= a(r^n-1)/(r-1)
for all a=3; r=2
Sn=3(2^n-1)
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