Find the sum of the coefficients !

Algebra | Find the sum of the coefficients of the polynomial | CAT 2014

This is a level -1 question on the topic of algebrs and it is an average level question, such questions help a lot in your preparation for the respective entrance exams.

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The problem discussed in the video:

The sum of coefficients of the polynomial is ( x - 1 ) ^ 9 ( x - 2 ) ^4 ( x - 4 )

a . 0 b. 16 c. -20 d. NONE

The solution to the problem: Follow the following steps,

Practice Question at the end :

Find the coefficient of the 4th term in ( x + y ) ^ 21

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[killing_gaming]

How is this even work 😮😮😮😮 im super duper amazed