Question

Find 18th term from the end of the ap 6,11,16,21... .......,151

Answer 1

the answer will be 91

as the common difference is 5

and 1st term is 6

the formula is a + ( n - 1 ) d

here substitute n = 18 , a = 6 , d = 5

then you will get the answe

Answer 2

Answer:

the answer is a18= 66

Step-by-step explanation:

you will get this answer when you reverse the whole AP from the end.

AP= 151......, 21, 16, 11, 6

so a= 151   d= -5

a18= 151+( 17)*(-5)

a18= 66