V. 45 ) 



= -—arc. tansf. "" =*^— — - arc; tan^r. — r-- 



Est itaquey ^r^^r^j^l^^'^q^ -B logfuyx^^^ipx-^p^^q 



It 

 t 



J* — ^ arc. tang. — + conft. 



S XLIX. 



Idem incegrale alio etiam modo invenire posfunns. 

 Est fcilicet: 



^j3^,--arc. tang. -; ergoy^sZij:^^ - ^--r— - 



arc. tang. -^V . 



Sit in hac aequatione posteriori <p :z: x + ^\ eric 

 cp^ ziix^ + 2bx'*'b^ ^ et d(^ :^ dx. Ergo: 



/d .T I JC + /; 



/yf d .T A X \ h 



" z . , , — X~T = r^-T— ^a arc. tan^, — - - — r-rr - -{- conir. 



Est d(/^* + 2^x+x^)=rC2^+2a;)dA;5* hinc 

 xdxz::ld(a^ -i-^bx^x^^-^bix^ acque 



-\logn.Qa^^^hx'^x''')^--r=J:===^ tang. Zy^'^i-' 



T • r Bxdx ^, — ■ ^B 



