
数学123
Authored by xi wang
Mathematics
1st - 5th Grade
Used 1+ times

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100 questions
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1.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
5+8
(a)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
sin (a+b)
sin a + sin b
cos a sin b + sin a cos b
2cos[(a+b)/2]cos[(a-b)/2]
sin a sin b+ cos a cos b
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
cot (a+b)
cot a+cot b
1/(tan(a+b))
(tana+tanb)/(1-tan a tan b)
没有特别
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
log(a+b)
log a + log b
log a x log b
log ab
没有特别
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
log a + log b
没有特别
log (ab)
log (a+b)
2log (ab)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
log a / log b
log (a-b)
log_b (a)
log (a/b)
没有特别
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
d/dx ( f(x) + g(x) )
d/dx f(x) + d/dx g(x)
没有特别
d/dx f(x) x d/dx g(x)
d/dx ( f(x)g(x) )
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