If the function `f(x)=x^4+b x^2+8x+1` has a horizontal tangent and a point of inflection for the same value of `x` then the value of `b` is equal to `-1` (b) 1 (c) 6 (d) `-6`

If the function f(x)=x^(4)+bx^(2)+8x+1 has a horizontal tangent and a point of inflection for the same value of x, then the value of b is equal to

If the function f(x)=x^(4)+bx^(2)+8x+1 has a horizontal tangent and a point of inflection for the same value of x, then the value of b is equal to

If the function f(x)=x^(4)+bx^(2)+8x+1 has a horizontal tangent and a point of inflection for the same value of x, then the value of b is equal to

If the function f(x)=x^(4)+bx^(2)+8x+1 has a horizontal tangent and a point of inflection for the same value of x, then the value of b is equal to

If the function f(x)=x^(4)+bx^(2)+8x+1 has a horizontal tangent and a point of inflection for the same value of x then the value of b is equal to -1 (b) 1 (c) 6 (d) -6

If the function f(x)=2-e^(-x) and g(x)=f^(-1)(x) , then the value of g"(1) is equal to -1 (b) 0 (c) 1 (d) 1/2

If f(x)= (x+1)/(x-1) then the value of f(f(x)) is equal to a)x b)0 c)-x d)1

If 1/x+2/3= 1/(2x)+3/4 then the value of x is A) 2 B) 8 C) 6 D) 4

Suppose the function f(x)-f(2x) has the derivative 5 at x=1 and derivative 7 at x=2 . The derivative of the function f(x)-f(4x) at x=1 has the value equal to (a) 19 (b) 9 (c) 17 (d) 14

Suppose the function f(x)-f(2x) has the derivative 5 at x=1 and derivative 7 at x=2 . The derivative of the function f(x)-f(4x) at x=1 , has the value equal to 19 (b) 9 (c) 17 (d) 14