Answer
$1$
Work Step by Step
RECALL:
(i) $(a^m)^n = a^{mn}$
(ii) $(ab)^m=a^mb^m$
(ii) $a^m \cdot a^n =a^{m+n}$
(iv) $a^0=1, a\ne0$
Use rule (iii) above to obtain:
$=4.1^{5+(-5)}
\\=4.1^0$
Use rule (iv) above to obtain:
$=1$