Question

(−1÷2)=20x(−1÷2)=9−(−1÷2) power 2x+1
?​

Answer 1

Answer:

Let F=(2x−1)  

20

−(ax+b)  

20

,G=(x  

2

+px+q)  

10

 

    F=G

Equating x  

20

 coefficient in F,G

2  

20

−a  

20

=1

Equating x  

19

 coefficient in F,G

20

C  

1

​

(2)  

19

(−1)−  

20

C  

1

​

(a)  

19

(b)=(10)(p)   (∵ for x  

19

, we have to take nine x  

2

 terms and one px which has probability of occuring as ten )

⟹p=−2(a  

19

b+2)

equating constant terms 1−b  

20

=q  

10

 

equating x term 10pq  

19

=20(2+ab  

19

)

pq  

19

=2ab  

19

+4

solving all these equations we get  

a=(1048575)  

20

1

​

 

,b=0,p=−4,q=−1

2

80q+6p

​

=−40−12=−52

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