If an= an-2 + 13 Is 807 in the sequence?
a)a1= 27
b)a2 = 54
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tohellandback
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IMO A
the series is
X,Y,X+13,Y+13,X+13+13,Y+13+13...
1)x=27
27+13N=807
13N=780
N=60
yes there is a term 807
SUFF
2)Y=54
54+13N=807
13N =753
not possible to get N as an integer
But this is not sufficient to say that 807 is not in sequence. depends upon a1.
the series is
X,Y,X+13,Y+13,X+13+13,Y+13+13...
1)x=27
27+13N=807
13N=780
N=60
yes there is a term 807
SUFF
2)Y=54
54+13N=807
13N =753
not possible to get N as an integer
But this is not sufficient to say that 807 is not in sequence. depends upon a1.
The powers of two are bloody impolite!!
