If x = – 1, then the value of   $$ {1\over x^{99}}+{1\over x^{98}}+{1\over x^{97}}+{1\over x^{96}}+{1\over x^{95}}+{1\over x^{94}}+x $$ is

if $$a+{1\over a}=5$$, then what is the value of $$a^3+{1\over a^3}$$

if  $${5x-{5\over x}+6=0}$$, then $$x^2+{1\over x^2}$$ is

Find the radius of the circle x²+y²-4x+6y=12

If $${{p^2\over q^2}+{q^2\over p^2}}=1$$, then the value of (p⁶ + q⁶ ) is

If x² + y² + z² = 2 (x + z – 1), then the value of : x³ + y³ + z³ = ?