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Grade: 12th pass
`        If a+b+c+d=4 then find out 1/(1-a)(1-b)( 1-c)+1/(1-b) (1-c) (1-d)+1/(1-c) (1-d) (1-a)+1/(1-d)( 1-b) (1-a) =?`
8 months ago

## Answers : (1)

Arun
13797 Points
```							Dear Sandeep Try to make denominator equal hence 1- d +1 - a +1 - b +1 -c/[(1- a)(1 -b)(1 - c)(1 -d)] = 4 - (a+b+c+d)/[(1-a)(1-b)(1-c)(1-d)]  = 4 -4 /[(1-a)(1-b)(1-c)(1-d)] = 0 RegardsArun (askIITians forum expert)
```
8 months ago
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