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If 256 1 ) a 200 ( ) a 180 ( 1 ..... ) a 60 ( ) a 40

1. a 40 ( ) a 20 ( 1 = − − + + − − + − − , then the maximum value of a is :
2. 198
3. 202
4. 212 (4) 218

Correct answer: 202

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