The points at which the tangent passes through the origin for the curve y=4x3−2x5 are
Question
The points at which the tangent passes through the origin for the curve y=4x3−2x5 are
Solution
The equation of the tangent line to the curve at a point (x, y) is given by:
y - y1 = m(x - x1)
where (x1, y1) is a point on the curve and m is the slope of the tangent line. The slope of the tangent line is given by the derivative of the function at that point.
The derivative of y = 4x^3 - 2x^5 is:
dy/dx = 12x^2 - 10x^4
So the equation of the tangent line is:
y - (4x^3 - 2x^5) = (12x^2 - 10x^4)(x - x1)
We want to find the points where this line passes through the origin. The origin is the point (0, 0), so we set x = 0 and y = 0 in the equation of the tangent line and solve for x1:
0 - (40^3 - 20^5) = (120^2 - 100^4)(0 - x1)
Solving this equation gives x1 = 0.
Substituting x1 = 0 into the equation of the curve y = 4x^3 - 2x^5 gives y1 = 0.
So the points at which the tangent passes through the origin for the curve y = 4x^3 - 2x^5 are (0, 0).
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