- #1
Husaaved
- 19
- 1
h(t) = [itex]\sqrt{t - 1}[/itex]
h(t + Δt) = [itex]\sqrt{t + Δt - 1}[/itex]
h(t + Δt) - h(t) = [itex]\sqrt{t + Δt - 1}[/itex] - [itex]\sqrt{t - 1}[/itex]
So far so good. This is where I get confused:
[itex]\frac{h(t + Δt) - h(t)}{Δt}[/itex] = [itex]\frac{1}{\sqrt{t + Δt - 1} - \sqrt{t - 1}
}[/itex]
I don't understand why dividing both sides by Δt allows for this statement to be true. Can someone explain this to me? It would be very much appreciated.
Thanks a lot.
h(t + Δt) = [itex]\sqrt{t + Δt - 1}[/itex]
h(t + Δt) - h(t) = [itex]\sqrt{t + Δt - 1}[/itex] - [itex]\sqrt{t - 1}[/itex]
So far so good. This is where I get confused:
[itex]\frac{h(t + Δt) - h(t)}{Δt}[/itex] = [itex]\frac{1}{\sqrt{t + Δt - 1} - \sqrt{t - 1}
}[/itex]
I don't understand why dividing both sides by Δt allows for this statement to be true. Can someone explain this to me? It would be very much appreciated.
Thanks a lot.