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Worksheets2019.11/11栄道場~logと2次関数~
Total questions: 6
Worksheet time: 6mins
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Worksheets(1)① t=log3x のとき、
y=(log3x)2−log3(x4)
を t を用いて表せ。
y=t2−4t
y=2t−t4
y=t2−t4
y=t2−4t4
(1)② t=log3x のとき、
0≦t≦4
1≦t≦4
1≦t≦81
0≦t≦81
(1)③ y=t2−4t
を平方完成せよ。
y=(t−2)2−4
y=(t+2)2−4
y=(t−4)2−16
y=(t+4)2−16
(1)④ y=(t−2)2−4
(0 ≦t≦ 4)
の最小値を求めよ。
-4
0
-3
最小値なし
(2) 8 < log10N < 9 のとき、
8桁
9桁
10桁
17桁
(3)① 240 の桁数を求めよ。
13桁
12桁
25桁
24桁
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