tentukan invers a) f(x) = 2x²+5 b) g(x)= 2x/6 - 1/6 c) h(x) = ³√x + ³√2

a) y = 2x^2 + 5
2x^2 = 5 - y
x^2 = (5 - y)/2
x = +, - akar (5 -y)/2
f `' ( x) = + ,- akar (5-x)/ 2