Question

find the eleventh term of ap from the last term27.23.19.......-65

Answer 1

l ( last term ) :- - 65

d = - 4

n = 11

To find last term :-
Tn = l - ( n - 1 )d

Tn = - 65 - 10 × ( - 4 )

Tn = - 65 + 40

Tn = - 25

Answer 2

d= 4 ,a= -65
nth term = an = a + ( n - 1 )d

a11 = -65 + ( 11 - 1 ) 4

= -65 + ( 10 × 4 )

= -65 + 40

= -25