If `P= (1,0);Q=(-1.0) & R= (2,0)` are three given points, then the locus of the points S satisfying the relation, `SQ^2 + SR^2 =2SP^2` is -

If P(1,0),Q(-1,0) and R(2,0) are three given points,then the locus of the point S satisfying the relation (SQ)^(2)+(SR)^(2)=2(SP)^(2)

Let P-=(a, 0), Q-=(-1, 0) and R-=(2, 0) are three given points. If the locus of the point S satisfying the reaction SQ^(2)+SR^(2)=2SP^(2) is 2x+3=0 . Then the sum of all possible values of a is

If A(-1, 0), B(1, 0) and C(3, 0) are three given points, then the locus of point D satisfying the relation DA^2 + DB^2 = 2DC^2 is (A) a straight line parallel to x-axis (B) a striaght line parallel to y-axis (C) a circle (D) none of these

If P(0,1,2),Q(4,-2,1) and O(0,0,0) are three points, then /_POQ=

The locus of point z satisfying Re (z^(2))=0 , is

If P(0, 1, 2), Q(4, -2, 1) and R(0, 0, 0) are three points, then anglePRQ is

If P is the point (1,0) and Q lies on the parabola y^(2)=36x , then the locus of the mid point of PQ is :