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Dec
10
comment Dynamic programming:Making a Change
no, this is not a dynamic programming approach.
Dec
9
comment Dynamic programming:Making a Change
so which coin values do you have and how many of them? Why don't you check five one-dollar and one five-dollar coins?
Dec
9
comment Dynamic programming:Making a Change
I can't catch your idea. Can you explain more? Maybe there will be a more instructive example. You did not mention which types of coin denomination you have. why don't you check five one-dollar and oen five-dollar notes?
Dec
9
awarded  Caucus
Dec
9
comment Binary operation commutative, associative, and distributive over multiplication
what have you tried?
Dec
7
reviewed Approve Riemann integrals real analysis
Dec
6
reviewed Approve Fourier Transform of $1/(\pi\cdot t)$ by Duality
Dec
5
reviewed Approve Prove that $ y''(0) = -1, x = \cos\left(\frac{t}{1+t}\right), y = \sin\left(\frac{t}{1+t}\right)$
Dec
3
reviewed Edit Solving linear first order differential equation with hard integral
Dec
3
revised Solving linear first order differential equation with hard integral
improved format
Dec
1
revised Confused on a question on sets and functions
typo
Dec
1
revised Confused on a question on sets and functions
typo
Dec
1
reviewed Approve Consider ODE ; find solution(s).
Nov
30
reviewed Approve the greatest value of an implicit function
Nov
30
comment What is the value of $a+b+c$?
You should post a new question if you have another question.
Nov
30
revised Trick for roots of symmetric polynomials
typos, using palindromic instead of symmetric
Nov
30
comment What is the value of $a+b+c$?
Can you show this "some algebra" and calculate the solution?
Nov
30
comment What is the value of $a+b+c$?
Can you calculate the solution?
Nov
29
answered Trick for roots of symmetric polynomials
Nov
27
revised System with two quadratic equations
I changed the title to something more meaningful