which term of the A. P. 3,8,13,18........is78
Answers
Answered by
12
a=3
d=8-3
5
=78
=a+(n-1)d
By applying the formula
78=3+(n-1)5
78-3=(n-1)5
=n-1
n=15+1
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Answered by
0
a = 3
d = 8 - 3
So, 5
an = 78
an = a + ( n - 1 ) 5
Using Formula
= 78 = 3 + ( n - 1 ) 5
= 78 - 3 ( n - 1) 5
= 75 / 5 = ( n - 1)
= n = 15 + 1 = 16
Therefore, n = 16
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