Question

in an ap 13th term is more is 9 more than is 10th term .find the common difference​

Answer 1

Answer:

3

Step-by-step explanation:

Let thw first term be 'a' and common difference be 'd'.

13th term = 9 + 10th term

a + (13 - 1)d = 9 + a + (10 - 1)d

a + 12d = 9 + a + 9d

a + 12d - a - 9d = 9

12d - 9d = 9

3d = 9

d = 9/3

d = 3

Common difference is 3

Answer 2

Answer:

From the question,

13th term = 10th term + 9

a + (13-1)d = {a+ (10-1)d} + 9

a + 12d = a + 9d + 9

12d = 9d + 9

3d = 9

d = 3

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