What is the common difference of 4n 3?
Solution:- Given that
an=3+4n
and, an-1=3+4(n-1)
Common difference(d)=
an-an-1
3+4n-{3+4(n-1)}
3+4n-3-4n+4
=4
Common difference(d)=4 Ans.
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see video solution:-
the nth term of an ap is given by an=3n+4 the common difference is
The nth term of any arithmetic progression in 4n-3 find the 15 the term
Soln:-
Given an=4n-3
Then
a15=4*15-3
a15=60-3=57
the 15 th term=57
Find the nth term of the a.p.10 ,15 ,20 ,25........
Soln:-a=10 , d=5
nth term of the a.p
=an=a+(n-1)d
an=10+(n-1)5
an=10+5n-5
an=5+5n
an=5n+5 Or 5(n+1) ans
