Question

In an arithmetic Progression a1 =13, a9= 6l then
the common difference is​

Answer 1

Answer:

6

Step-by-step explanation:

a1 = 13 = a ( First term )

a9 = 61

a9 = a + (n-1) d {n = 9 here}

=> 13 + 8d = 61

=> 8d = 48

=> d = 6