C sampai E..................

jawabannya lihat di lampiran ya

semoga jelas dan membantu ya (Gbu)

c) (a^-1 + a^-2 + a^0) / (a^-4 + a^-3 + a^-2)
= (a^-2 + a^-1 + a^0) / (a^-4 + a^-3 + a^-2)
= (a^-2 . 1 + a^-2 . a + a^-2 . a^2) / (a^-4 . 1 + a^-4 . a + a^-4 . a^2)
= a^-2 (1 + a + a^2) / a^-4 (1 + a + a^2)
= a^-2 / a^-4
= a^(-2 - (-4))
= a^2

d) (ab^-1 - a^-1b)/(b^-1 - a^-1)
= (a/b - b/a) / (1/b - 1/a)
= ((a^2 - b^2)/ab) / ((a - b)/ab)
= (a^2 - b^2) / (a - b)
= (a + b)(a - b) / (a - b)
= (a + b)

e) (ab^-1 - a^-1b)/(b^-1 + a^-1)
= (a/b - b/a) / (1/b + 1/a)
= ((a^2 - b^2)/ab) / ((a + b)/ab)
= (a^2 - b^2) / (a + b)
= (a + b)(a - b) / (a + b)
= (a - b)