Answer:
320
Step-by-step explanation:
42^2-38^2= (42+38)(42-38)
=80*4
=320
Answer:
johnny boy init
Step-by-step explanation:
YOOO
You have sold 72, and your friend has sold 74. Meaning your friend has sold 2 more magazine subscriptions than you.
D(1/x)/dx= d(x^-1)/dx
= -x^-2
the derivatives of the two cases you mentioned is as follows:
(I) f(x)=k/x
d{f(x)}/dx= k×(-x^-2)
= -kx^-2
(ll) f(x)=x/k
d{f(x)}= d(x/k)/dx
= 1/k
you can just simply take out the constant from the derivative and multiply it to the final answer of the derivative of the given function.
Step-by-step explanation:
use calculator , it might be helpful
