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Sequences and Series

Question

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The x-axis and y-axis taken together determine a plane known as ____________.

Solution

XOY or the XY-plane.

Question

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The coordinates of points in the XY-plane are of the form __________.

Solution

(x, y, 0).

Question

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Coordinate planes divide the space into _______ octants.

Solution

eight

Question

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Let P (-2, 3, -4) is a point in space. Find the co-ordinates of the foot of perpendicular from this point to ZX-plane.

Solution

For ZX - plane, y = 0, so the co-ordinates of the required point are (-2, 0, - 4).

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