Question

First term of an AP is25 and the 20th term is 500 gind the common difference

Answer 1

Answer:

Step-by-step explanation:

a = 25

a20 = a+19d

= 25+19 d = 500

= 19d = 475

= d = 475/19

= d = 25

Answer 2

Answer:

25

Step-by-step explanation:

First term = a1 = 25

20th term = 500

Find n term:

an = a1 + (n - 1)d

Given that a1 = 25

an = 25 + (n - 1)d

Find d:

Given that the 20th term is 500

500 = 25 + (20 - 1)d

500 = 25 + 19d

19d = 475

d = 475 ÷ 19

d = 25

Answer: The common difference is 25