Question

In an AP T5:T10 = 1:2and T12 = 36. Find difference.

Answer 1

Answer:

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Answer 2

Answer:

3, 6, 9, 12, 15, 18, 21, 24, 27, 30...

'n'th term in ap = a + (n-1)d

Thus, here, 5th term = a+4d

10th term = a+9d

12th term = a+11d

Given, (a+4d) / (a+9d) = 1/2

or, 2a + 8d = a + 9d

or, a = d

Also given, 12th term ⇒ a + 11d = 36

or, 12d = 36 [as a=d is proved previously]

or, d = 3

Thus, a = 3

Therefore, the ap: 3, 6, 9, 12, 15, 18...

Step-by-step explanation:

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