put n=0jube wrote:Each of the following equations has at least one solution EXCEPT:
-2^n = (-2)^-n
2^-n = (-2)^n
2^n = (-2)^-n
(-2)^n = -2^n
(-2)^-n = -2^-n
A -1=1
B 1=1
C 1=1
D 1=1
E 1=-1
So the fight is between A and E.
-2^n = (-2)^-n
for any Positive value of n, LHS is integer and RHS is fraction.
for any negative value of n, LHS is fraction and RHS is integer.
Hence no solution exists.
E
(-2)^-n = -2^-n
Both LHS and RHS will be either fractions or integers.
Hence pick A.
What is OA?
