which term ofAP 3,8,13,18...,is 78?
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A=3,d=8-3=5
A78=A+77D
3+5=8
8 ,Term is ap
A78=A+77D
3+5=8
8 ,Term is ap
Answered by
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a = 3
d = 5
l = 78
n = ?
We know that:-
l = a + (n-1) d
78 = 3 + (n-1) 5
78-3 = (n-1)5
75 = (n-1) 5
75/5 = n-1
15 = n-1
n = 15+1
n = 16
Therefore 78 is 16th term of AP.
Hope it helps.
d = 5
l = 78
n = ?
We know that:-
l = a + (n-1) d
78 = 3 + (n-1) 5
78-3 = (n-1)5
75 = (n-1) 5
75/5 = n-1
15 = n-1
n = 15+1
n = 16
Therefore 78 is 16th term of AP.
Hope it helps.
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