Fie expresia:
E(x) =
[tex]( \frac{1}{(x - 2)(x + 2)( {x}^{2} + 4 ) + 16} - \frac{1}{25 - (5 - x)(5 + x)} ) \div 2 \times {( \frac{x + 1}{ {x}^{4} } )}^{ - 1} [/tex]
a) aratati ca E(x) =
[tex] \frac{1 - x}{2} [/tex]
b) calculati suma:
E(-3) + E(-5) + E(-7) + ... + E(-2009)
c) calculati suma primelor 60 de zecimale ale numarului (E(2))²⁰⁰​