Thread: Change in y and differentrial dy

Let .
Find the change in , when and
Find the differential when and

can i get some help with this please?

thank you

Originally Posted by mybrohshi5

Let .
Find the change in , when and
Find the differential when and

can i get some help with this please?

thank you

Currently,

So we can say that

We can then re-write this as:

And we know that , so we can say:



We know that

So:



For the second part, just differentiate it and then take it from there.

for the first one use the formula;
= f(x+delta(x))-f(x)
and for the other
dy=f'(x)dx