Question

the 17th term of an AP is 5 more than twice its 8 th term.if the 11th term is 43,find its nth term

Answer 1

Hey dear mate here is your solution.....

Answer 2

a+16d=5+2(a8)
a+16d=5+2(a+7d)
a+16d=5+2a+14d
16d-14d=2a-a+5
2d=a+5
a-2d=5_1equation
a+10d=43_2 equation
Solving 1 and 2
D=4,a=3
aN=a+(n-1)d
nth term =3(n-1)d
3+4n-4=4n-1