Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Coefficient of x 203 in the expression (x – 1) (x 2 – 2) (x 3 – 3)..... (x 20 – 20) must be-
Text Solution
Verified by ExpertsThe correct answer is:
C
Expression = x . x 2 . x 3 ..... x 20 
...... 
= x 210 . E
Where E = 
...... 
Now coefficient of x 203 in original expression = coefficient of x –7 in E
But E = 1 – 
+ 
– 
= Coefficient of x –7
= –7 + 6 + 10 + 12 – 8 = 13.
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