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数学123

Authored by xi wang

Mathematics

1st - 5th Grade

Used 1+ times

数学123
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100 questions

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1.

FILL IN THE BLANKS 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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