f = (f1 f2) / (f1 + f2)
f(f1 + f2) = f1 f2
f f 1 + f f 2 = f1 f 2
f1 f2 - f f2 = f f1
f2 (f1 - f) = f f1
f2 = (f f1) / (f1 - f) <==== solution
3x+2x= 5x
Sorry, I cant understand what the second line means, hopefully this helped:)
Answer:
Therefore, the solution is:
Step-by-step explanation:
We calculate the given integral. We use the substitution t = 7x.
Therefore, the solution is: