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VISHWESH RAVI Grade: 12th Pass
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Co-efficient of t in the expansion of, ( + p)m - 1 + ( + p)m - 2 ( + q) + ( + p)m - 3 ( + q)2 + ...... ( + q)m - 1 where   - q and p  q is :

1.

2.

3.

4.

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7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
```										Dear VISHWESH
given series is geometric progression
find the sum of the series which is equal to
=(α +p)m-1 [{(α +q)/(α+p)}m  -1 ] /[{(α +q)/(α+p)}  -1]
simplyfy it
=[(α +q)m -(α+p)m]/(q-p)

now find the coeffiecient of αt in this expression
=[mCt qm-t  - mCt pm-t]/(q-p)
Please feel free to post as many doubts on our discussion forum as you can.If you find any question Difficult to understand - post it here and we will get youthe answer and detailed  solution very  quickly. We are all IITians and here to help you in your IIT JEE preparation.All the best. Regards,Askiitians ExpertsBadiuddin

```
7 years ago
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