Asked by Ginotomba

three numbers are in harmonic progression. If the third number were decreased by 4 they would
be in arithmetic progression. If the third number were decreased by 3 they would be in geometric
progression. Find the third term of the harmonic progression.
Answered by Steve
1/b - 1/a = 1/c - 1/b
b-a = (c-4)-b
b/a = (c-3)/b

I get c=12
Answered by Landro
how do i first derive the equation?
There are no AI answers yet. The ability to request AI answers is coming soon!