Answers edited by Vinícius Ferraz

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• If #A= <7 , 2># and #B= <8, -1 >#, what is #||A+B|| -||A|| -||B||#?
  
• How to find x and y?
  
• How do you find the exact value of #sin^-1(-sqrt3/2)#?
  
• 11^1/7 in radical form?
  
• How do you solve #\frac { 1} { 3} ( 3y + 3) - \frac { 3} { 8} = \frac { 3} { 4} y#?
  
• If #x# and #y# are positive numbers, what is the minimum possible value of #(x+y)(1/x + 1/y)# ?
  
• What is the largest rectangle that can be inscribed in an equilateral triangle with sides of 12?
  
• How do you solve # 1/3 + 2/(3y) = 1/y^2#?
  
• #forall u, v#, #((2,3,5,7), (13,17,19,23)) * ((64,28,-18), (-64,-27,18), (15,5,-5), (0,0,1)) * ((1), (u), (v)) = ((11), (29))# ?
  
• How do you proof this?
  
• The product of two consecutive odd natural numbers is 483. What are the numbers?
  
• Have we formulas for #f(n) = cos frac{pi}{2^n}# and #g(n) = sin frac{pi}{2^n}# in radicals?
  
• Question #7ba0c
  
• Question #fee42
  
• How do you simplify #\frac { a ^ { \frac { 1} { 5} } a ^ { \frac { 6} { 5} } } { a ^ { \frac { 9} { 3} } }#?
  
• Question #e2637
  
• What is the internal angle sum of a hexagon?
  
• How do you write #3x^2(2x^3 – 4x^2)# in standard form?
  
• Question #71e5d
  
• What is the domain of #fog(x)# given #f(x)=sqrt(x-2)# and #g(x)=1/(2x)#?
  
• Explain and solve?
  
• The #r_("th")# term of a geometrical series is #(2r+1)cdot 2^r#. The sum of the first #n# term of the series is what?
  
• If on dividing the polynomial #x^4-x^3-13x^2+sx+t# by #(x+3)(x+4)# remainder is #0#, find the value of #s# and #t#?
  
• How do you simplify #root3(1/4)#?
  
• Can you demonstrate this propiety of integrals?
  
• 9 years ago Jane was twice as old as Millie. The sum of their ages now is 35. How old is Millie now?
  
• If x varies inversely as y, and x = 13 when y = 9, how do you find x when y = 0, 3, 6, 12, 15, 18?
  
• How do you find the primitive of #e^(2logx)#?
  
• The function #f : RR -> RR# satisfies #xf(x) + f(1 - x) = x^3 - x# for all real #x#. Find #f(x)#?
  
• How do you solve #(3n)/(n-1)+(6n-9)/(n-1)=6#?
  
• How many isosceles triangles can be made in the x-y plane that satisfy all of the following conditions: a. Integer coordinates, b. Area = 9, c. A vertex at the origin?
  
• Have we formulas for #f(n) = cos frac{pi}{2^n}# and #g(n) = sin frac{pi}{2^n}# in radicals?
  
• How do you use the binomial series to expand #(x-1)^8#?
  
• Please help me graph?