Make u the Subject of 1/u +1/v = 1/f

[@Luke-nz3zx]

Better than a textbook, thank you

[@MathsWithJay]

Thank you!

[@lyricalalex9378]

i usually despite the existence of maths but with the proof that the answer was right gave me interest in it! Thank you.

[@MathsWithJay]

@Silver Ace: It's always good to do a check when possible

[@victinyyt]

very good explanation and steps, i liked it a lot and helped me for exams!

[@MathsWithJay]

That's great!

[@reyankhan5452]

In which class you are in

[@anbu1157]

K

[@Nafeelllll]

Thanks👍

[@MathsWithJay]

Welcome 👍

[@PrincessBrain-y7q]

Why did you change the positive sign to the negative sign

[@MathsWithJay]

At what time in the video?

[@vedika.1757]

Thank you so much, it was really helpful 🤍

[@MathsWithJay]

You’re welcome 😊

[@septicaemiaussus5875]

Thank you so much, this helped alot 💙

[@MathsWithJay]

You're so welcome!

[@agoosewithaplan4941]

u dont know how much this helped me

[@MathsWithJay]

It's great that you found this useful!

[@brianmaggs8714]

Brilliant! I've been trying for hours to come to terms (Ha! Ha!) with this typical style of equation i.e. all fractions, but your explanation and 'number' example hits the nail on the head! Eureka!!! [I don't get eureka moments very often!)👍✔🎁

[@MathsWithJay]

@Brian Maggs: Thank you so much! It's great to know that you've found this so useful

[@halalbacon1764]

kerem bal needed this

[@MathsWithJay]

🙂

[@muthukumarmadasamy8254]

Iam confused in v-f/fv after that step why we need to take reciprocal of the whole equation please reply me

[@MathsWithJay]

At what time in the video?

[@muthukumarmadasamy8254]

At last before step you have teached . that is 1/u=v-f/fv and finally get the answer as u=fv/f-v that step i can't understand please tell me

[@MathsWithJay]

You could "cross multiply" or take reciprocal of both sides..think of a simpler example: if 1/x=2, then x=1/2

[@muthukumarmadasamy8254]

@@MathsWithJay you given one example know in that example 1/x=2 then when we do cross multiplication we answer as 3x/2 only

[@vivaticas]

Great explanation!

[@MathsWithJay]

Glad you think so!

[@simonagonistes8844]

useful, thanks.

[@MathsWithJay]

Thank you!

[@raphaelogbaa9061]

Thanks for the explanation

[@MathsWithJay]

You're welcome

[@littlecas5344]

I'm just confused on how u combined the 1/v and 1/f. Isn't it that what u do on side of the equation u should do to the other?

[@MathsWithJay]

@Rhona: Think about how you would combine ordinary fractions such as 1/2 + 1/3

[@rajmodi4920]

Just think about it as cross multiplying

[@giselle1471]

I sir my is Jezeal I'm a student am getting trouble this question here for me can u help with it? If 1/u + 1/v = 1/s, make u the subject, expressing the result as a simple fraction.

[@MathsWithJay]

This video is similar

[@FalconPlayZz]

Maths with Jay more specialised in physics

[@MathsWithJay]

These could be any variables

[@AbdiAhmed-fd9ps]

you lost me there

[@MathsWithJay]

@Abdi: At what time in the video?

[@maazazmi3000]

1/v = ?? Please reply

[@MathsWithJay]

Subtract 1/u from both sides....what does that give you?

[@Dissent5748]

thank you so much bro

[@MathsWithJay]

You're welcome!

[@Tarkin275]

Can you make a find F pls

[@MathsWithJay]

Start by adding together 1/u and 1/v...

[@Tarkin275]

Thanks so much

[@raphaelogbaa9061]

@@MathsWithJay so is this ans correct 1/f=u+v/uv or 1/f=uv/u+v

[@dragon12108]

Thanks

[@MathsWithJay]

Welcome

[@uttamkumarsarkar1719]

This derivation can be done by a 3 year old kid.

[@MathsWithJay]

I'd like to see that!