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Dec
24
comment Graphing Parabolas ( finding area)
@Daniel That's how you solve for the intersection points. At the intersection points, $y$ values from two curves are equal.
Dec
24
comment Graphing Parabolas ( finding area)
You need to first solve for the coordinates of the two intersection points, and then calculate the area of the triangle
Dec
24
comment Graphing Parabolas ( finding area)
@JanEerland The triangle formed by the origin and two intersection points.
Dec
24
revised Graphing Parabolas ( finding area)
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Nov
25
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11
comment Sheldon Cooper Primes
There is an article about Sheldon Number in the November 2015 issue of Math Horizons.
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Dec
26
reviewed Approve How nuclear norm is convex whereas weighted nuclaer norm is not?
Dec
26
reviewed Approve $G^k$ is $k$-connected
Dec
26
comment Finding variance of the sample mean of a random sample of size n without replacement from finite population of size N.
This is the variance of the mean of a simple random sample in survey sampling. You could find the proof on an introductory book on sampling. For example, home.iitk.ac.in/~shalab/chapter2-simple-random-sampling.pdf
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26
reviewed Approve Prove that this is a metric space?
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20
accepted Number of ways to put $k$ different numbers in $n$ place