Answer:
c. 69
b. 7
Step-by-step explanation:
Is a problem solving method that uses that fact that any number or expression can be multiplied by one without changing it's value.
let's put value of t in equation.
x = 2√t
x = 2√y
x/2 = √y
(x/2)^2 = y
y = x^2 /4
now let's differentiate it with respect to x.
dy/dx = 2x/4 = x/2
differentiating again wrt to x
d^2y/dx^2 = 1/2
I think your missing one which is G