a)a=xk+yk a=k(x+y) k(x+y)=a k=a:(x+y) b)b=2k-ak 2k-ak=b k(2-a)=b k=b:(2-a) c)c= (k + 1)b+sk (k + 1)b+sk=c kb+b+sk=c bk+sk=c-b k(b+s)=c-b k=(c-b):(b+s) d)d=k/k-1 /*(k-1) d(k-1)=k dk-d=k dk-k=d k(d-1)=d k=d:(d-1) e) e= k-1/k+1 /*(k+1) e(k+1)=k-1 ek+e=k-1 ek-k=-1-e k(e-1)=-1-r k=(-1-e):(e-1) f) k=k+1/k + a /*k k²=k²+1+ak k²-k²-ak=1 -ak=1 k=1/(-a) g) g = 2 -1/k /*k gk=2k-1 gk-2k=-1 k(g-2)=-1 k=-1/(g-2) i) i= a/2 + 2/k /*k ik=ak/2+2 ik-½ ak=2 k(i-½a)=2 k=2/(i-½a)
a)a=xk+yk a= k (x+y) / : (x+y) a / (x+y) = k k = a/ (x+y) b)b=2k-ak b = k(2-a) / : (2-a) b / (2-a) = k k = b / (2-a) c)c= (k + 1)b+sk c = bk+ b+ sk c-b = k (b+s) / : (b+s) (c-b) / (b+s) = k k= (c-b) / (b+s) d)d=k/k-1 / * (k-1) d (k-1) = k dk - d = k dk-k = d k (d-1) = d / :(d-1) k = d / (d-1) e) e= k-1/k+1 / *(k+1) e * (k+1) = k-1 ek +e = k-1 ek-k = -1-e k (e-1) = -1-e / : (e-1) k = (-1-e )/ (e-1) f) k=k+ 1/k + a / *k k² = k² +1+ ak k²-k² -ak = 1 -ak = 1 / :(-a) k = 1 / -a g) g = 2 -1/k / * k gk = 2k -1 gk-2k = -1 k (g-2) = -1 / :(g-2) k = -1 / (g-2) i) i= a/2 + 2/k / *2k 2ki = ak + 4 2ki-ak = 4 k (2i -a) = 4 / : (2i -a) k = 4/(2i -a)
