14. 1 point the equation of the spher joining (2,-3,4) and (-5,6,-7) as diameter is: (a) x+y+z +x+ y+z=0 (d) ** + tzitxtytz= 0 (c) x* + y + z + 3x 3y + 3z - 56

14. 1 point The equation of the spher joining (2,-3,4) and (-5,6,-7) as diameter is: (a) x+y+z +x+ y+z=0 (D) ** + tzitxtytz= 0 (c) x* + y + z + 3x 3y + 3z - 56 = 0 (d) None of these O a O b O C O d 29 1 point * If the plane lx + my + nz = p touches the x +y +z =a", then l +m* +n is equal to (a) 1 (C)p'/a (b) p (d) a /p*