Homework Statement
A question gives the problem find the two arithmetic means between 4 and 19.
The answer is 9 and 14.
Homework Equations
(a1+a2+a3+an)/n
The Attempt at a Solution
Logic would dictate that the arithmetic mean would be adding 4 and 19 then dividing by two. Leaving...
Homework Statement
∫tan^2(2x)/sec2x dx; u=sec2x; du=1/2tan^2(2x)dx.
Homework Equations
∫1/x(dx)-ln|x|+C.
∫1/u(du)=ln|u|+C
The Attempt at a Solution
This is me trying to rewrite the equation. (sin^2(2x)/cos^2(2x))/(1/cos2x), (sin^2(2x))/(cos(2x)).
Honestly, I feel lost trying to...