Question

The term independent of x in [x2-1/]9 is​

Answer 1

Answer:

29

x

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Answer 2

Answer:

We know, T  

r+1

​  

=  

n

C  

r

​  

a  

n−r

b  

r

 

Applying to the above question, we get

T  

r+1

​  

=(−1)  

r

 

9

C  

r

​  

x  

18−2r

x  

−r

 

=(−1)  

r

 

9

C  

r

​  

x  

18−3r

 ...(i)

For term independent of x

18−3r=0

∴r=6

Substituting in (i), we get

T  

7

​  

=  

9

C  

6

​  

 =84

Step-by-step explanation: