21 21 If the 4th terms in the expansion of px + x-1m is 2 5 - Maths - Binomial Theorem

Question

21?

21   I f   t h e   4 t h   t e r m s   i n
  t h e   e x p a n s i o n   o f   p x  
+   x - 1 m   i s   2 5   f o r   a l l
  x   ∈   R ,   t h e n a   p  
=   5 2 ,   m   =   3      
                 
                 
  ( b )   p   =   1 2 ,   m   =
  6                
                 
              ( c )   p
  =   - 1 2 ,   m   =   6    
                 
                 
                ( d )
  n o n e   o f   t h e s e

Amit Shukla · Accepted Answer

Kindly, refer to the below link for similar query,

https://www meritnation
com/ask-answer/question/if-4th-term-in-the-expansion-of-ax-1-x-n-is-5-2-then-t/binomial-theorem/3335868

Regards

21? 21 . I f t h e 4 t h t e r m s i n t h e e x p a n s i o n o f p x + x - 1 m i s 2 . 5 f o r a l l x ∈ R , t h e n a p = 5 2 , m = 3 ( b ) p = 1 2 , m = 6 ( c ) p = - 1 2 , m = 6 ( d ) n o n e o f t h e s e

21?

$21 . I f t h e 4^{t h} t e r m s i n t h e e x p a n s i o n o f {(p x + x^{- 1})}^{m} i s 2.5 f o r a l l x \in R, t h e n (a) p = \frac{5}{2}, m = 3 (b) p = \frac{1}{2}, m = 6 (c) p = - \frac{1}{2}, m = 6 (d) n o n e o f t h e s e$