MBA Exam

plz solve this questn and explain it.. i am facing problm in this..a function f(z1,z2,z3........,zn)= f(z1,zn)+ f(z2,z3,z4....., z(n-1))+ (z1+z2+z3.....+zn); for n>0 f(y,z)=f(z,0)+ f(0,y)f(y,0)= y+ f(y-1,0)f(0,y)= y- f(0,y-1)f(0,0)=1find the value of f(1,2,3,4,...........,n), where n is a perfect cube less than 50 and n is greater than 25

1) 1665
2) 1089
3) 729
4) not defined

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MBA Other Question
Find the smallest positive integer "n" for which (2^2-1 )(3^2-1)(4^2-1)...(n^2-1) is a Perfect Square?

1) 7
2) 8
3) 9
4) 11
 ‘a’ and ‘b’ are the roots of the equation 2x^2 – 7x – 10 = 0, where
a > b. If Zn = a^n – b^n for n > 0, then
find the value of 2Z6 - 10Z4/ Z5.

1) 6
2) 7
3) 12
4) 14