计算:(1) 4cos60°+( 1 2 ) -2 -(3.14-π ) 0
1个回答
(1)原式=4×
1
2 +
1
(
1
2 ) 2 -1
=2+4-1
=5.
(2)原式=1-2×
1
2 +4×
2
2
=1-1+2
2
=2
2 .
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