Problem Solving (PS) | If x^4 + y^4 = 100, then the greatest possible value of x is between

A common mistake in such type of questions can be that one assumes that x and y are integers.
so y cannot be 0. by assuming this the option becomes A.
but it is nowhere given that they are integers. and cannot be equal to 0.
so we maximise x. which gives us x = 100^1/4 and y = 0.
we get x = 3.16

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