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Grade: 10 

                        
The value of 1/(2n+1)Cr + 1/(2n+1)Cr+1 is equal to A) 1/2nCr B) 1/2nCr+1 C)( 2n+2)/(2n+1) * 1/2nCr
2 years ago

Answers : (1)

Arun
24742 Points 
							
take LCM
 
2n+1Cr+1 + 2n+1Cr / (2n+1)Cr (2n+1)Cr+1
 
 = 2n+2Cr+1 / (2n+1)Cr (2n+1)Cr+1
 
Now open factorial sign
 
you will get the answer in simplified form
 
Regards
Arun (askIITians forum expert)
2 years ago
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