Question

Q.No.2: the 20th term of Arithmetic Progression
from ending is (a) (B) (c) (D)

A.P.IS 22,25 28,31,-----------322​

Answer 1

Answer:

265

Step-by-step explanation:

Here,

 Common difference = d = 28 - 25 = 25 - 22 = 3

From ending AP looks like:

     322...31, 28, 25, 22, and thus common difference becomes negative( now that is - 3 ).

 In APs nth term is given by a + ( n - 1 )d, where a is the first term and d is the common difference. From ending first term is 322 and common difference is - 3.

Therefore, 20th term from last:

 ⇒ 322 + ( 20 - 1 )( - 3 )

 ⇒ 322 + 19( - 3 )

 ⇒ 322 - 57

 ⇒ 265