Thread: Sequence-Gprep

Quote: Originally Posted by abhasjha IMO - B If a(n) = a(n-1) + k, then a(1), a(2),.....a(15) is an arithmetic progression. Statement (2) says a(8) = 10 a(8) is the middle term and hence the Median of this series. The number k can be positive or negative. If k is negative, then the numbers a(1), a(2) etc. will be in descending order and if it is positive, then the series will be in ascending order. No matter what, there will be 7 terms which...

Abhasjha, thats cool! cheers. #and takes a swig#

[quote=abhasjha;847481] IMO - B If a(n) = a(n-1) + k, then a(1), a(2),.....a(15) is an arithmetic progression. Statement (2) says a(8) = 10 a(8) is the middle term and hence the Median of this series. The number k can be positive or negative. If k is negative, then the numbers a(1), a(2) etc. will be in descending order and if it is positive, then the series will be in ascending order. No matter what, there will be 7 terms which will be...

answer should be C we know the first term and one of the term 8th term of an AP so we can find out the AP.. hence C

IMO - B If a(n) = a(n-1) + k, then a(1), a(2),.....a(15) is an arithmetic progression. Statement (2) says a(8) = 10 a(8) is the middle term and hence the Median of this series. The number k can be positive or negative. If k is negative, then the numbers a(1), a(2) etc. will be in descending order and if it is positive, then the series will be in ascending order. No matter what, there will be 7 terms which will be greater than 10 (Please note...

Quote: Originally Posted by abhasjha IMO - B If a(n) = a(n-1) + k, then a(1), a(2),.....a(15) is an arithmetic progression. Statement (2) says a(8) = 10 a(8) is the middle term and hence the Median of this series. The number k can be positive or negative. If k is negative, then the numbers a(1), a(2) etc. will be in descending order and if it is positive, then the series will be in ascending order. No matter what, there will be 7 terms which...