P=1/3(a ²+ 2ax) P=1/3a²+2/3ax x=P-1/3a²/2/3a x=3P-a²/2a d) d=k/k-1 dk-d=k dk-k=d k(d-1)=d k=d/d-1 e) e=k-1/k+1 ek+e=k-1 ek-k=-1-e k(e-1)=-1-e k=-1-e/e-1 f) f=k+1/k + a fk+fa=k+1 fk-k=1-fa k(f-1)=1-fa k=1-fa/f-1 g) g= 2- 1/k k=1/g i) i=a/2 + 2/k k=a/2 + 2/i Nie wiem czy to dobrze
P=1/3(a² + 2ax) P=1/3 a² + 2/3 ax /×3 3P = a² +2ax 2ax=3P - a² /:a 2x=3P/a -a /:2 x=3P/2a -2a d) d=k/k-1 /×(k-1) d(k-1)=k dk -d=k k=dk-d e) e=k-1/k+1 /×(k+1) e(k+1)=k-1 ek +e=k-1 k=ek + e + 1 f) f=k+1/k + a /×(k+a) f(k+a)=k+1 fk +fa=k+1 k=fk+fa-1 g) g= 2- 1/k /×k gk=2k-1 2k=gk+1 /:2 k=gk+1/2 i) i=a/2 + 2/k /×2k 2ik=ak +4 ak=2ik - 4 /:a k=2ik-4/a
x=(3P-a²)/2a d) k=-d/(1-d) e)k=(e+1)/(1-e) f)k=(fa-1)/(1-f) g) k= 1/(2-g) i)k=4/(2i-a)
