1.

If x, y and z are all different from zero and ∣∣∣∣1+x1111+y1111+z∣∣∣∣=0, then the value of x−1+y−1+z−1 is (a) xyz (b) x−1y−1z−1 (c) −x−y−z (d) −1

Answer»

If x, y and z are all different from zero and ∣∣
∣
∣
1+x1111+y1111+z∣∣
∣
∣
=0
,

then the value of x−1+y−1+z−1 is

(a) xyz
(b) x−1y−1z−1
(c) −x−y−z
(d) −1



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