(-1)^0+丨-4丨-√12;√8-丨-√2丨+(-1/2)^0;求X:(x-0.7)^3=0.027,这三个题谁会啊,
问题描述:
(-1)^0+丨-4丨-√12;√8-丨-√2丨+(-1/2)^0;求X:(x-0.7)^3=0.027,这三个题谁会啊,
答
(-1)^0+丨-4丨-√12
=1+4-2√3
=5-2√3
√8-丨-√2丨+(-1/2)^0
=2√2-√2+1
=√2+1
(x-0.7)^3=0.027,
x-0.7=0.3
x=1