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Hello, The DVD+

**R**and DVD-**R**are competing ...the formats. However, because the DVD-**R**format has been in use since 1997, it has...2 Answers · Consumer Electronics · 12/02/2008

Multiply by

**r**: 1 - 1/2**r**^2 = 3/5**r**1/2**r**^2 + 3/5**r**- 1 = 0 5**r**^2 + 6r - 10 = 0 And solve using the quadratic equation.3 Answers · Science & Mathematics · 05/08/2009

assume

**r**is any number. {**r**∈**ℝ**} as x becomes sufficiently close to that number, f(x) becomes arbitrarily close to f(**r**). for example: say**r**= 7 which means: f(**r**) = f(7) as x approaches...1 Answers · Science & Mathematics · 14/10/2013

**R**=(ab)/(a+b)**R**(a+b) = ab Ra + Rb = ab Rb = ab - Ra Rb = a(b-**R**) a = (Rb)/(b-**R**)1 Answers · Education & Reference · 01/11/2008

**r**= 4 cscθ then**r**sinθ = 4. now,**r**cosθ = x, while**r**sinθ = y.... these are the equations needed to transform cartesian to polar ... thus you have y = 4. (a horizontal line) §1 Answers · Science & Mathematics · 14/04/2008

Let f:

**R**->**R**' be an isomorphism. If**R**is commutative, and a... of**R**', then a' = f(a) and b' = f(b) for some a,b in**R**. Then we have: a'b' = f(a)f(b) = f(ab) = f(ba) = f(b)f(a) = b'...2 Answers · Science & Mathematics · 05/12/2012

**r**^2+**r**=A/(2ph)? If so, then**r**^2+**r**-A/(2ph)=0=>**r**=[-1+/-sqrt(1+2A/(ph)]/2 =>**r**=[-1+sqrt(1+2A/(ph))]/2 or**r**=[-1-sqrt(1+2A/(ph))]/22 Answers · Science & Mathematics · 20/09/2013

Use the facts that sin(θ) = y/

**r**and**r**= √(x^2 + y^2). First, for**r**= 3sin(θ):**r**= 3sin(θ)**r**= 3(y/**r**... is a circle. In the subject line, I'll assume you mean**r**= sin(3θ) and not**r**= sin^3 (θ). You'll have to use a trig identity for...1 Answers · Science & Mathematics · 19/05/2007

**r**= 7(c - x)**r**/7 = 7(c-x)/7**r**/7 = c - x**r**/7 + x = c2 Answers · Science & Mathematics · 16/02/2012

(

**R**+**r**)(**R**-**r**) = A/pi R²-r² = A/pi <--- this is the difference of two squares method R² = A/pi + r²**R**= √(A/pi+r²)4 Answers · Science & Mathematics · 26/04/2012