Recent content by saintdick

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    Subspace in R^4: Investigating (2x+3y, x, 0, 1) as a Potential Subspace

    Homework Statement Is this a subspace of R^4, (2x+3y, x, 0 , 1) . Give reasons Homework Equations The Attempt at a Solution I am completely stuck at this one
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    How check for subspaces in Linear Algebra?

    Thanks for your reply, but i am still confused? what to do you mean when you ask " What are x" and y" in this case". So let me get this straight, when you prove it the way you did, as long as the form doesn't change then that means it's a subset. For the basis, are both of those columns form...
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    How check for subspaces in Linear Algebra?

    Homework Statement consider R^4. Let V be the set of vectors in the form ( 2x+3y, x, 0 , -x+2x) is this a subspace of R^4 and why? find a basis if it's possible Homework Equations The Attempt at a Solution I know that the set must work under scalar multiplication and vector...
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    How Does the Alligator Population Change Over Time in a Swamp?

    Ho chiro, I used separtion of variable to get: dx/x(x-100)=dt/10000 integrated both side, used PFD for left side: 1/100 ln(x-100)-1/100 ln(x)= 1/10000 *t +c now what? how do i solve this for x?
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    How Does the Alligator Population Change Over Time in a Swamp?

    This has been posted before but i didn't understand the answer Suppose the number x(t) (with t in months) of alligators in a swamp satisfies the differential equation dp/dt = 0.0001x^2 - 0.01x (a) If there are initially 25 alligators in the swamp, solve this differential equation to...
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