5. (thx ) = ch 2 x ch 2 u (thu ) x = ch 2 x dx = thx + c 1 u 1 6. (cthx ) = 2 sh x (cthu )x = 2x sh u sh 2 x dx = cthx + c 1 u x 7
5. (thx ) = ch 2 x ch 2 u (thu ) x = ch 2 x dx = thx + c 1 u 1 6. (cthx ) = 2 sh x (cthu )x = 2x sh u sh 2 x dx = cthx + c 1 u x 7
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