Find the second and term and nth term of an A.P Whose 6th term is 12 and 8th term is 22
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in A.P
we know that an = a1 + (n - 1) d
given a6 = a1+ (6-1)d.
12. = a1+ 5d ---1
and. a12 = a1 + (12 -1 )d.
22. = a1 + 11d---- 2
from 2 -1
we get 6d =10 hence d = 10/6 = 1.67
and. a1 = 12 - 5*1.67 = 3.65
hence the 2nd term = 3.65 + (2-1)*1.67 = 5.32
and nth term an = a1 + (n - 1) d
we know that an = a1 + (n - 1) d
given a6 = a1+ (6-1)d.
12. = a1+ 5d ---1
and. a12 = a1 + (12 -1 )d.
22. = a1 + 11d---- 2
from 2 -1
we get 6d =10 hence d = 10/6 = 1.67
and. a1 = 12 - 5*1.67 = 3.65
hence the 2nd term = 3.65 + (2-1)*1.67 = 5.32
and nth term an = a1 + (n - 1) d
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