根号18-(π-1)º-2cos45°+(1/4)负一次方

问题描述:

根号18-(π-1)º-2cos45°+(1/4)负一次方

根号18-(π-1)º-2cos45°+(1/4)负一次方
=3√2-1-2× √2/2 +4
=3√2-√2 +3
=2√2+3

原式=√18-(π-1)º-2cos45°+(1/4)负一次方
=√(3²×2)-1-2×√2/2+1/(1/4)
=3√2-1-√2+4
=2√2+3