Question

the image of 5,2,-7 in the xy plane________

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Answer 1

Answer:

Step-by-step explanation:

P(5,2,−7) be the point & I be its image and F be its foot ⊥ in x-y plane ⇒z=0

∴F=(5,2,0)

PF=FI  (image is equidistant from mirror as object is from mirror)

∴F divides PI in 1:1.

∴I=(5,2,7).

The fig(ii) shows three directions along x-axis,y-axis,z-axis.

P(−4,0,7) be the point & I be its image.

and F be its foot of ⊥ in x-z plane ⇒y=0

∴F=(−4,0,7)

PF=FI⇒Fdivides PI in 1:1.

∴I=(−4,0,7)