4. Let n≥2, let A and B b en×n matrices and let On be the n×n matrix with every entry 0. (b) Suppose that A2 = On. Show that In − A is invertible, and that (In − A)-1 = In + A. (c)...

4. Let n≥2, let A and B b en×n matrices and let On be the n×n matrix with every entry 0. (b) Suppose that A2 = On. Show that In − A is invertible, and that (In − A)-1 = In + A. (c)...

I have 7-9 of these answers correct, but it does not tell me which ones are incorrect (although I have a hunch). The following are the problems and the answers are in bold that I have given. -8x2+5y2-z2=0...

16y2-25x2+z2=1 is the equation. It wants: The quadratic surface is an _____ with x-intercept when x = _______, y-intercept when y = _______, z-intercept when z = ______. I...

<4,5,3> makes a (right, obtuse, or acute) with u. <5,-1,2> makes a (right, obtuse, or acute) with u. <-8,0,4> makes a (right, obtuse, or acute) with u. <3,2,-3>...

Gandalf the Grey started in the Forest of Mirkwood at a point with coordinates (−3,3) and arrived in the Iron Hills at the point with coordinates (−1,6). If he began walking in the direction of the...

I have 1/sqrt(10), 3/(sqrt(10)), 3/sqrt(10). I cannot understand why this is not the answer. It is pointing in the same direction.

I had tried the points (0,0,0)-(-4,2,4) and then use the distance formula, but that has not worked. Then I tried (1,1,1), but that also did not work. I am lost. Any help is needed.

(We are talking about vectors. R = (4, 5, 5). Then it has, ||->OR|| = _____. I'm not sure how you find OR if you do not have what O is...

While a planet P rotates in a circle about its sun, a moon M rotates in a circle about the planet, and both motions are counterclockwise in the same plane. Let's call the distance between M and P...

I have written: (x+3)2+(y-7)2+(z-1)2-sqrt(588)/2 = 0. But it is marked incorrect.

I had put the equation as: (x-5)^2+(y-3)^2+(z+6)^2 However it was viewed as incorrect. Also they had that it equaled zero. equation input =...

Find the equation of the sphere centered at (−1,10,2) ( − 1 , 10 , 2 ) with radius 4. ___________________ = 0 Give an equation which describes the intersection of this...

Calculate the area of the region bounded by the two curves, y = 4 - x2 and y = x + 2. The answer is meant to be 9/2 but I just cannot get it!!! Maybe my bounds are incorrect......

I need help with this task. cx(x^2/a^2+y^2/b^2)=y^2,x=b^2/c

Find the volume of the solid bounded by the plane z = 5 and the hyperboloid z = SquareRoot(9+x^2+y^2)

Use Lagrange multipliers to find the maximum and minimum values

Use Lagrange multipliers to find the maximum and minimum values

a triple integral in spherical coordinates to find the volume of the solid bounded by the surface s z=0, z=a, x2+y2+z2= 4a2

Can u please specify how the boundaries are found and whether its better to integrte it using cylindrical or rectangular coordinates. Thank you in advance

How to find umin(d,r) if xtanθ - (gx^2)/(2u2cos2θ) > r + √(r2-(x-d)2) for d-r < x < d+r ? And 0 < θ < π/2 , d and r can be any positive real number which d &g...

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