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The coefficient of x50 in (1 + x)41 (1 - x + x2)40 is

1.
1

2.
2

3.
3

4.

```
7 years ago

147 Points
```										Dear Vishwesh
(1 +  x)41 (1 - x + x2)40
=(1+x)(1 +   x)40 (1 - x + x2)40
=(1+x)(1+x3)40
=(1+x3)40     +x(1+x3)40
both  the term does not contain x50 term because 50 is not  multiple of 3
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```
7 years ago
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