Question

FIND THE. 13 THERM FROM THE LAST TERM OF AN A.P 27,23,19,:;:,-65

Answer 1

from the last term
first term(a) =-65
common difference(d)=4
therefore
a+(13-1)d
-65+12multiply 4
-65+48
-17
therefore -17 is the 13th term from last term

Answer 2

$<b> <tt >$
last term is given -65 , a = 27, d= a2-a1=23-27=-4.

we know the formula .

=> an= a+(n-1)×d

=> -65 = a+(13-1)×-4

=> -65 = a+(12)-4

=> -65 = a -48

=> a= -65+48

=> a = -17