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Maths Puzzle
An-1=2n-5
its nth term is
A)3n-1
B)4n-2
C)2n-3
D)n-4
E)ALL
Read Solution (Total 3)
-
- C)2n-3
A(n-1)=2n-5
An = 2*(n+1)-5 = 2n+2-5 = 2n-3
option C) - 12 years agoHelpfull: Yes(4) No(0)
- A(n-1)=2n-5
An = 2*(n+1)-5 = 2n+2-5 = 2n-3 - 12 years agoHelpfull: Yes(1) No(0)
- Ans. C)2n-3
Explanation:
A(n-1) = 2n-5
Replacing n by n+1 , we get
An = 2*(n+1)-5 = 2n+2-5 = 2n-3
Hence Ans. Option C) 2n-3 - 12 years agoHelpfull: Yes(0) No(0)
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