Which term of the AP : 3,8,13,18,....is 78?
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hi Divya
This is an AP
there fore here
a = 3 ( First Term )
d = 5 ( 8 - 3 = 5 , common difference)
and nth term = 78 (nth term is denoted by "an")
an = a + (n - 1) d
.78 = 3 + (n - 1) × 5
78 - 3 = ( n - 1) ×5
75/ 5= (n - 1)
15 = ( n - 1)
n = 16
Hence 16th term of the AP will be 78
hope it helps
#jerri
This is an AP
there fore here
a = 3 ( First Term )
d = 5 ( 8 - 3 = 5 , common difference)
and nth term = 78 (nth term is denoted by "an")
an = a + (n - 1) d
.78 = 3 + (n - 1) × 5
78 - 3 = ( n - 1) ×5
75/ 5= (n - 1)
15 = ( n - 1)
n = 16
Hence 16th term of the AP will be 78
hope it helps
#jerri
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