given the following sequence,determine if it is an arithmetic progression or not . If it is an arithmetic progression find it's general term -5 , 2 , 9 , 16 , 23 , 30.
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It is an arithmetic progression
a= -5. d= 7 an=30 n=?
an=a+(n-1)d
30 = -5 +(n-1) 7
30 =-5 +7n -7
30 =7n -12
30 +12 =7n
42 = 7n
n =42/7
n = 6
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