What is the Relationship Between K and X in a Quadratic Equation?
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In the quadratic equation 4x^2 + kx + 1 = 0, the value of k can only be determined as a function of x due to the presence of two unknowns. Participants agree that unless additional information is provided, such as a specific value for x, k must be expressed in terms of x. The discussion highlights the equivalence of solving for k in terms of x and solving for x in terms of k. Clarification is sought to ensure no other information is overlooked that could aid in finding k. The conversation emphasizes the simplicity of the problem-solving approach.
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In the equation 4x^2+kx+1=0 I'm supposed to find the value of k. But since there are two unknowns, it is only possible to find k expressed as a function of x right...?
Kindly see the attached pdf. My attempt to solve it, is in it.
I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction.
I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook.
Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water.
I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...