If `(4+sqrt15)^n=I+F` when I, n are positive integers, `0 lt F lt 1` then `(I+F)(1-F)=`

" If "(4+sqrt(15))^(n)=I+F" when "I," n are positive integers,"0ltFlt1" then "(I+F)(1-F)

If (5+2sqrt(6))^(n)=m+f, where n and m are positive integers and 0<=f<=1, then (1)/(1-f)-f is equal to

If (2+sqrt(3))^n=I+f, whare I and n are positive integers and 0

If (9 + sqrt80)^n =1+f, where I, n are integers and 0 lt f lt 0 : (A) I is an odd Integer (B) I is even integer (C) (I+f) (1-f)=1 (D) 1-f=(9-sqrt 80)^n

If (6+sqrt(35))^(n)= I+F when I is odd and 0ltFlt1, then (1+F)(1-F)=

If (9 + 4 sqrt(5))^(n) = I + f ,n and l being positive integers and f is a proper fraction , show that (I-1 ) f + f^(2) is an even integer.