[(-1/4)^4005] × [16^2003]
=[(-1)^4005] × {[4^(-1)]^4005} × [(4^2)^2003]
=(-1) × {4^[(-1)×4005]} × [4^(2×2003)]
=(-1) × [4^(-4005)] × (4^4006)
=(-1) × [4^(-4005+4006)]
=(-1) × (4^1)
=(-1) × 4
=-4
[(-1/4)^4005] × [16^2003]
=[(-1)^4005] × {[4^(-1)]^4005} × [(4^2)^2003]
=(-1) × {4^[(-1)×4005]} × [4^(2×2003)]
=(-1) × [4^(-4005)] × (4^4006)
=(-1) × [4^(-4005+4006)]
=(-1) × (4^1)
=(-1) × 4
=-4