Question

Find tn for following AP and also find 45th term A.P. is 6, 11/2,5​

Answer 1

Answer:

A.P= 6,11/2,5

A1=6

A2=11/2

A3=5

d=a2-a1

=11/2-6

=11-12/2

=-1/2

tn=a+(n-1)d

=6+(n-1)-1/2

=6+(-1/2n+1/2)

=6-1/2n+1/2

=12+1/2-1/2n

tn=13/2-1/2n

45th term = a+(n-1)d

=6+(45-1)-1/2

=6+(44-1/2)

=6+(-22)

=-16