if 2 n + 3 is equals to a n of AP then find a d and 15th term of AP
Answers
Answered by
0
nth term is equal to. a+(n-1)d
a+(n-1)d= 3n + 5
On opening bracket on l.h.s.
dn + (a-d)= 3n + 5.
On comparing both the sides.
dn= 3n therefore d=3.
Also a-d = 5
a-3 =5
a= 8
a+(n-1)d= 3n + 5
On opening bracket on l.h.s.
dn + (a-d)= 3n + 5.
On comparing both the sides.
dn= 3n therefore d=3.
Also a-d = 5
a-3 =5
a= 8
Similar questions