Question

Si A(-1,-1,0) y B(k,-2,2), ¿cuales dos valores puede tomar k para que d(A,B)=3?


PORR FAAAAAA URGENTE!!!!!

Answer 1

        ________________________
d = √ ( x - x1²) + (y -y1)² + (Z-Z1)²
        _____________________
3 = √ (-1-k)² + (-1-(-2))² + (0-2)²

9 = (1+k)² + 1 + 4

4 = (1+k)²

+ 2 = (1+k)

Entonces:

2 = 1+k              ó          -2= 1+k
k =1                              k = -3