If `f(x) = ( x^2 + 1 ) / x` then find f`(4)

(a) If f(x)=x+2 and g(x+1)=x+1 then find g@f(4)

(i) If f(x) = 3x^(4)- 5x^(2) + 7, " find " f(x-1) (ii) If f(x) = x^(2) - 3x + 4 , then find the values of x satisfying f(x) = f(2x+1)

If B = [{:(-1, 0), (2, 4):}] " and " f(x) = x^(2) - 4x + 5, then find f(B).

If f(x)=(x-1)/(x+1), then find f{f(x)}

If f(x)=e^(x)(x^(2)+1) then find f'(x)

(1) If f(x)=a^(x)*e^(x^(2))" then find "f'(x)

If f'(x)=x/2 + 2/x and f(1)=5/4 , then find f(x) .