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 f(x) = int(5x^(8)+7x^(6))/((x^(2)+1+2x^(7))^(2))dx, (x ge 0) , and f(0) = 0, then the value of f(1) is

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

If Delta_(1) = |(7,x,2),(-5,x +1,3),(4,x,7)| and Delta_(2) = |(x,2,7),(x +1,3,-5),(x,7,4)| , then the value of x for which Delta_(1) + Delta_(2) = 0 , is

If 49x^(2)-b=(7x+(1)/(2))(7x-(1)/(2)), then the value of b is