If x+2=7 then the value of x is ?

If [2x+y,4x,5x-7 4x]=[7 7y-13 y x+6] , then the value of x+y is x=3 , y=1 (b) x=2 , y=3 (c) x=2 , y=4 (d) x=3 , y=3

If f: RvecR and g: RvecR are defined by f(x)=2x+3a n dg(x)=x^2+7, then the value of x such that g(f(x))=8 a, 1,2 b. -1,2 c. -1,-2 d. 1,-2

If |(2x,5),(8,x)|=|(6,-2),(7,3)| then the value of x is

If x is real then the values of (x^(2) + 34 x - 71)/(x^(2) + 2x - 7) does not lie in the interval

If x,y,z in R & Delta =|(x,x+y,x+y+z),(2x,5x+2y,7x+5y+2z),(3x,7x+3y,9x+7y+3z)|=-16 then the value of x is

[{:(2x+y,4x),(5x-7,4x):}]=[{:(7,7y-13),(y,x+6):}] then the value of x,y is

If sin^4 x + cos^4 x = 7/2 sinx.cosx, then the value of x equals to