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Q.

The coefficient of x in the expansion of x+33 is:

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a

1

b

9

c

18

d

27 

answer is D.

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Detailed Solution

Given, a polynomial x+33.
We need to find the coefficient of x in the expansion of x+33.
Using the formula,
a+b3=a3+b3+3a2b+3ab2
Substituting the values of a and b,
x+33=x3+27+9x2+27
Therefore, coefficient of x is 27.
Hence, the correct option is 4.
 
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