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Interpretation of "three coplanar lines intersect"
How should "three coplanar lines intersect" be drawn? Will they form something that looks like an asterisk? Or three lines that somehow form a triangle? O...
Apr 15, 2026
Archive: News
news
How does my calculator calculate the roots for a cubic polynomial?
For example, many calculators come equipped with the quadratic formula, and so you can give them $A,B,C$ coefficients, and they will show you out the solu...
Apr 15, 2026
news
Inequality with two absolute values
I'm new here, and I was wondering if any of you could help me out with this little problem that is already getting on my nerves since I've been ...
Apr 15, 2026
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How to evaluate $\lim\limits_{h \to 0} \frac {3^h-1} {h}=\ln3$?
How is $$\lim_{h \to 0} \frac {3^h-1} {h}=\ln3$$ evaluated?
Apr 15, 2026
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addition of two negative numbers using signed 10's complement
the question given was:- (-9742)+(-641) since we take the complement of the negative numbers, the 10's complement of first number was 258 and for the...
Apr 15, 2026
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Find the column space, null space and special solution for a matrix.
I'm supposed to find the column space, null space, and the special solution for a matrix. Changing to reduced row echelon form I get... $ \begin{bmat...
Apr 15, 2026
news
Values tried for partial fraction decomposition
I'll explain my question with the following example from wikipedia. Suppose, we have a function: $$ f(x)=\frac{1}{x^2+2x-3} $$ Here, the denominator ...
Apr 15, 2026
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odds of winning
My son did something quite impressive the other day. It was shear luck but I don't think I'll ever see it duplicated again in my lifetime. I bro...
Apr 15, 2026
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Inverse 4x4 Matrix using Calculator
My calculator only supports a 3x3, 3x2, 3x1, 2x3, 2x2, 2x1, 1x3, 1x2, 1x1 matrices. Is there any chance I can get the inverse of the 4x4 using my calculat...
Apr 15, 2026
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Requirements to fully prove convergence using the integral test.
Based on the theorem below, when using the integral test to prove the convergence or divergence of a series, does one need to also prove the series itself...
Apr 15, 2026
