Question

find the 20th term from the last term of the ap 3,8,13.........253​

Answer 1

Answer:

The answer is 98

Step-by-step explanation:

To find the 20th term we use the formula - T20 = a + (n - 1) d

where, a = 3, d = t2 - t1 i.e 8- 3 = 5 and n = 20

Substituting the values we get

T20 = 3 + (20 - 1) 5

= 3 + (19) 5

= 3 + 95

= 98

Answer 2

Answer:

hey mate here is your answer....

Step-by-step explanation:

➡️ Common difference of AP is 5, therefore this AP can be written in reverse order as 253, 248, 243,.....13, 8, 5

• here a = 253
• d = 248 - 253 = -5
• n = 20
• a20 = a + ( 20 - 1 ) d
• a20 = 253 + (19) (-5)
• a20 = 253 - 95
• a = 158

▶️ Therefore 20th term from last term is 158.

Hope it helps!✌️