Mathematics
Senior High
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想問問!為什麼不能是5=根號5t啊?
類題 19平面上a=(2-1),6=(4,3),令c=à+坊,若:
(1)與(2,1)平行,t= >
c = (2-1)+(443)
=(41+2,3t-1)
2
4112-11-2
24=4
+22
121
(2)平分、6的夾角,求t=
1n|= 4+1=15
=
希望數士陳方樂坊等長
t=
15
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