After how many places the decimal expansion of 13/40 will terminate?

Remember that .

So, dividing by 40 means dividing by 10, then by 2, then by 2 again.

So, we can go like this: let's divide by 10 first

Then, we divide by 2:

And by 2 again:

So, the decimal expansion ends after 3 digits.

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1