write the first five terms of the seqence by an=(-1)n-12n
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acording to me u shall get ur ans easily just by puting n= 1 , 2 , 3 , 4 , 5 ........
try this n match ur ans
ATQ
an= (-1)n -12n
= -n-12n = -13n
puting n = 1 , 2 , 3, 4 and 5
an = 13, 26 , 39 , 52 and 65 respectively
try this n match ur ans
ATQ
an= (-1)n -12n
= -n-12n = -13n
puting n = 1 , 2 , 3, 4 and 5
an = 13, 26 , 39 , 52 and 65 respectively
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