Question

find the firth term from the end in an A.P -11,-8,-5,........49​

Answer 1

Answer:

T15=31

Explanation:

Tn=49

a+(n-1)d=49

-11+(n-1)3=49

n-1=20

n=19

49 is the 19 th term in the given AP

so fifth term from the end is T 15

we know a=-11 and d=3      

T15=a+14d  ......(1)

substituting the values of a and d in (1) we get

T15=-11+(14*3)

     =31