the nth term of an AP is 7-4n.Find the common difference.
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Answered by
6
nth term of an AP is 7-4n
then,A1= 7-4(1)=7-4=3
A2=7-4(2)=-1
now d= A2-A1
=-1-3=-4
then,A1= 7-4(1)=7-4=3
A2=7-4(2)=-1
now d= A2-A1
=-1-3=-4
Answered by
2
tn = 7-4n
tn=3 + (n-1)-4
compare now with
tn=a+(n-1)d
d= -4
tn=3 + (n-1)-4
compare now with
tn=a+(n-1)d
d= -4
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