Question

Determine the value n if 20 cn+2=20 c2n-1​

Answer 1

Answer:

n = 6

Step-by-step explanation:

Given, 20 C 10

= 20C n+4

⇒ 10!10! 20!

= (n+4)!(16+n)! 20!

⇒10=n+4

⇒n=10−4

⇒n=6

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Answer 2

Answer:

Step-by-step explanation: