Solución

a.   0.80000000−0.80000000

b.   0.98000000 −0.98000000

c.   0.99800000−0.99800000

d.   0.99980000−0.99980000

e.   1.2000000−1.2000000

f.   1.0200000−1.0200000

g.   1.0020000 −1.0020000

h.   1.0002000−1.0002000limx1(12x)=1\mathop {\lim }\limits_{x \to 1} \left( {1 - 2x} \right) = - 1