Question

The common difference of an ap is 5/2. What would be the difference of its 15th term and 5th term ?

Answer 1

            Answer:

                    25

 Step-by-step explanation:

AP = a1 , a2 , a3 , a4

AP = a , a+d , a+2d , a+3d

d = 5/2

15th term - a15 = a + 14d

5th term  -  a5 = a + 4d

a15 - a14

= a + 14d - (a + 4d)

= a + 14d - a 4d

= 14d - 4d

= 10d

= 10 × 5 / 2

= 5 × 5

= 25

∴  the difference of its 15th term and 5th term is 25

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