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ddocm
Username
ddocm
Score
69
Membership
Stats
Questions
14
Answers
3
15 Questions
3 Answers
0
490
1
+69
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
Feb 20, 2021
0
426
1
+69
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
Feb 20, 2021
0
538
1
+69
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
Feb 14, 2021
0
763
4
+69
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
Feb 3, 2021
0
708
3
+69
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
Jan 29, 2021
0
785
3
+69
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
read more ..
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ddocm
Jan 28, 2021
0
446
1
+69
weird function problem
If f(x)= -1/x , what is f(f(f(f(f(6)))))?
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ddocm
Jan 22, 2021
0
523
1
+69
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
Jan 22, 2021
+1
549
2
+69
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
Jan 21, 2021
0
556
2
+69
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
read more ..
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ddocm
Jan 21, 2021
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#2
+69
+1
thanks!
ddocm
Mar 7, 2021
#4
+69
+3
Yes this is correct. Thank you.
ddocm
Feb 3, 2021
#2
+69
+1
The answer is wrong. GV * VH = XV * VY isn't true.
ddocm
Feb 3, 2021
+69 