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yangtheary

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7 years, 291 days
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These are questions asked by yangtheary

Definite Integral...

yangtheary 80 Maple
integration
September 06 2016
1 1

how many time we write number 3...

yangtheary 80 Maple
number_theory
January 25 2016
0 9

we have positive number from 1 to 1000. how many time we write number 3?

Nice harmonic sum ...

yangtheary 80 Maple
January 05 2016
1 0

Find S=1+1/2+1/3+1/4+...+1/n ,n is integers .

Find the coordinates of points H...

yangtheary 80 Maple
July 16 2015
2 1

Let ABC be a triangle with A(3,0,0),B(0,6,0),C(0,0,4) and let H(x,y,z) be its orthocenter .Find the coordinates of point H ?

Solve equation ...

yangtheary 80 Maple
integer solve
May 15 2015
2 10

solve 30a+75b+110c+85d+255e+160f+15g+12h+120i=8000 over the positive integers

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