Solve the following system of linear equation using matrix method.
3x + y + z = 1, 2x + 2z = 0, 5x + y + 2z = 2.
Verify the conditions of Rolle's Theorem for the following function.
Find a point in the interval, where the tangent to the curve is parallel to x - axis.
Find the equation of the standard ellipse, taking its axes as the coordinate axes, whose minor axis is equal to the distance between the foci and whose legth of latus rectum is 10. Also, find its eccentricity.
Let the equation of ellipse be
Then the foci are S(ae, 0) and S'(- ae, 0)
As given, Length of minor axes = 2b
Length of latus rectum =
BB' = SS'
2b = 2ae
b2 = ae ...(i)
[given ]
b2 = 5a ...(ii)
We also know b2 = a2(1 - e2) ...(iii)
Substituting eq. (i) and (ii) in eq. (iii),
5a = a2 - b2
= a2 - 5a
Thus, a = 10 and b2 = 50
Therefore, equation of ellipse is
Putting value of a and b in eq. (iii), we get
50 = 100 (1 - e2)
A rectangle is inscribed in semicircle of ardius r with one of its sides on the diameter of the semicircle. Find the dimensions of the rectangle to get maximum area. Also, find the maximum area.