Question

If a=15 and a12 = 124 , the value of d is ​

Answer 1

Mate please complete the question. And then it would be my pleasure to help you.

Answer 2

Answer:

The answer is given below

Step-by-step explanation:

Given that,

a = 15

$a_{12}$ = 124 -----------(1)

Substituting a = 15 in equation (1)

General formula for Arthematic Progression is

$a_{n}$ = a + (n-1)d

$a_{12}$ = a + (12-1)d

124 = 15 + 11d

124 - 15 = 11d

109 = 11d

d = $\frac{109}{11}$

d = 109/11

So,The value of d = 109/11

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