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ddocm
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ddocm
Punkte
54
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11
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2
12 Questions
2 Answers
0
14
1
+54
Algebraic cube question
Six positive integers are written on the faces of a cube. Each vertex is labeled with the product of the three numbers on the faces adjacent to the vertex. If the sum of the numbers on the vertices is equal to 1001, then what is the sum of the numbers
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ddocm
27.02.2021
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28
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Good online math courses?
Does anyone here know any good online math courses? I want something that covers topics in-depth and that is around highschool level in terms of difficulty. I want it to video-based and would rather it be live than pre-recorded. I know this isn't what usually
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ddocm
27.02.2021
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16
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Function problem
If f(x)= (ax+b)/(cx+d), abcd ≠ 0 and f(f(x))=x for all x in the domain of f, what is the value of a+d?
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ddocm
20.02.2021
0
17
1
+54
Function problem
Let N,O be functions such that N(x) = 2/sqrt(x), and O(x) = x^2. What is N(O(N(O(N(O(3)))))?
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ddocm
20.02.2021
0
25
1
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Compute the sum (a +(2n+1)d)^2- (a + (2n)d)^2 +(a + (2n-1)d)^2 - (a+(2n-2)d)^2 + ... + (a+d)^2 - a^2
Compute the sum (a +(2n+1)d)^2- (a + (2n)d)^2 +(a + (2n-1)d)^2 - (a+(2n-2)d)^2 + ... + (a+d)^2 - a^2
A full explanation on how to do the problem would be appreciated.
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ddocm
14.02.2021
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45
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Power of a point circle question
In the diagram below, EU = 8, UF = 7,GV = 5, VH = 16, and UV= 6. Find XY.
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ddocm
03.02.2021
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84
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Semicircle problem
In the adjoining figure, CD is the diameter of a semicircle with center O. Point A lies on the extension of DC past C; point E lies on the semicircle, and B is the point of intersection (distinct from E) of line segment AE with
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ddocm
29.01.2021
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82
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Circle in a trapezoid problem
Quadrilateral ABCD is an isosceles trapezoid, with bases AB and CD. A circle is inscribed in the trapezoid, as shown below. (In other words, the circle is tangent to all the sides of the trapezoid.) The length of base AB is 2x and
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ddocm
28.01.2021
0
53
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+54
weird function problem
If f(x)= -1/x , what is f(f(f(f(f(6)))))?
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ddocm
22.01.2021
0
47
1
+54
Given that f(x)= (1/ 𝝅 ) x , what is the range of f(x) on the interval [0,∞) ?
Given that f(x)= (1/𝝅)x, what is the range of f(x) on the interval [0,∞)?
Give your answer in interval notation.
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ddocm
22.01.2021
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56
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Three circles inside of a triangle- geometry
Three circles are drawn, so that each circle is externally tangent to the other two circles. Each circle has a radius of 2. A triangle is then constructed, such that each side of the triangle is tangent to two circles, as shown below. Find the perimeter
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ddocm
21.01.2021
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59
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Trapezoid proof problem
Quadrilateral ABCD is an isosceles trapezoid, with bases AB and CD. A circle is inscribed in the trapezoid, as shown below. (In other words, the circle is tangent to all the sides of the trapezoid.) The length of base AB is 2x and the length of
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ddocm
21.01.2021
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#4
+54
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Yes this is correct. Thank you.
ddocm
03.02.2021
#2
+54
+1
The answer is wrong. GV * VH = XV * VY isn't true.
ddocm
03.02.2021
+54 