`(x)/(2)+(x)/(3)+(x)/(4)=7` find the value of "x".

If x^(2) +(1)/(x^(2)) = 7. find the values of , 3x^(2) - (3)/(x^(2))

Two complementary angles are (x+4)^(@) and (2x-7)^(@) , find the value of x

If lim_(x to a) (x^(7) + a^(7))/(x + a) = 7 , find the value of a.

If x=sqrt(3) find the value of 2x^2-8x+7.

f(x)=3x^4+2x^3-(x^2)/3-x/9+2/(27),\ g(x)=\ x+2/3 find the value of f(x)-g(x).

If x^2+1/(x^2)=7 , find the value of x^3+1/(x^3)

"Let "f(x)=((2^(x)+2^(-x))sin x sqrt(tan^(-1)(x^(2)-x+1)))/((7x^(2)+3x+1)^(3)) . Then find the value of f'(0).

If x^(2) + (1)/(x^(2))= 7 and x ne 0 , find the value of : 7x^(3) + 8x- (7)/(x^(3))- (8)/(x)

If x=(5)/((2!).3)+(5.7)/((3!).3^(2))+(5.7.9)/((4!).3^(3))+…. then find the value of x^(2)+4x.

"If "-(2)/(7),x,-(7)/(2)" are in G.P. Find the value of x."