Re: Finding an unknown value

For this problem you need to solve the equation for v.

Start by substituting the algebraic terms with the values provided, i.e. u = and f = .

Therefore, the equation is as follows:

This becomes:

- because having '1' on top of a fraction inverts the fraction.

The equation is then solved as follows:

Re: Finding an unknown value

For this problem you need to solve the equation for v.

Start by substituting the algebraic terms with the values provided, i.e.

and

.

Therefore, the equation is as follows:

This becomes:

- because having '1' on top of a fraction inverts the fraction.

The equation is then solved as follows:

Re: Finding an unknown value

Quote:

Originally Posted by

**David Green** 1 divided by u, + 1 divided by v, = 1 divided by f

I am required to find the value of V

If u = 4/5

If f = 2/3

Your work is very "messy", David.

Equation is:

1/u + 1/v = 1/f ; isolate v term on left:

1/v = 1/f - 1/u ; substitute values:

1/v = 1/(2/3) - 1/(4/5) ; simplify

1/v = 3/2 - 5/4

1/v = 6/4 - 5/4

1/v = 1/4

v = 4