quradratic probing

Question

which is correct method for QP :

1) 

2) H(k) = (H+ i^2)mod m

Comments

1st one .

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http://research.cs.vt.edu/AVresearch/hashing/quadratic.php

this is general case , second case happens when c1=0

hash function should be explicitly mentioned.

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Here values are c1 and c2 will be explicitly mentioned right ??

After 1st collision i =1 , 2nd collsion i = 2.......