Simplify: `1-[1-{1-(1- 1-1)}]` (a) 0 (b) 1 (c) 2 (d) 3

When simplified (-1/(27))^(-2/3) is (a) 9 (b) -9 (c) 1/9 (d) -1/9

If a b+b c+c a=0 , then what is the value of (1/(a^2-b c)+1/(b^2-c a)+1/(c^2-a b)) ? (a) 0 (b) 1 (c) 3 (d) a+b+c

Value of [ ( 1/3 )^(-1 ) - ( 1/4 )^-1 ]^-1 ( a ) 1 ( b ) 0 ( c ) 3 ( d ) -1

When simplified (256)^-(4^((-3//2)\ )) is (a) 8 (b) 1/8 (c) 2 (d) 1/2

When simplified (256)^(-(4^((-3/2)))) is 8(b) (1)/(8) (c) 2 (d) (1)/(2)

If omega=(-1+sqrt(-3))/(2) , then (1)/(1+omega)+(1)/(1+omega^(2))= (a) 0 (b) - 1 (c) 1 (d) 2w

When simplified (-(1)/(27))^(-(2)/(3)) is 9(b)-9(c)(1)/(9)(d)-(1)/(9)

If a/b+b/a=\ -1, then a^3-b^3=? (a)1 (b) -1 (c) 1/2 (d) 0

If a/b+b/a=1, then a^3+b^3=? (a) 1 (b) -1 (c) 1/2 (d) 0