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Use the eight numbers 0.2.4.6.8.10.14.16 to make four formulas. The result of each formula is 10, and each number can only be used
16-6,14-4,10-0,2+8
Find the rule 2,4,5,9,3,16,2,25,5,36,3,49,2
Find the rule 2, 4, 5, 9, 3, 16, 2, 25, 5, 36, 3, 49, 2
The first one is prime
The molecule is square
The denominator is the sum of the first two denominators
The next one is 19 and 81 / 21
A two - digit prime number, exchange the number of one digit and ten digit, the two - digit is still prime number, write all such two - digit
11,13,17,31,37,71,73,79,97
It is known that f (x) = (x-1) (X-2) (x-3) (X-100) find f '(1)
The result seems to be - 1 * 2 * 3 * 4 * 5...... * 99
Let g (x) = (X-2) (x-3)... (X-100), then G (1) = (- 1) * (- 2) * (- 3)... (- 99) = - 99! And f (x) = (x-1) g (x). The derivation of F '(x) = g (x) + (x-1) g' (x).. f '(1) = g (1) = - 99
In a round stadium, three players are busy in the competition, the distance they run is different, and the final result is the same
A small tree is five feet high. The child is climbing half of the tree, with pearl treasure in his arms and red tassel hat on his head
The first is the table
A number is a factor of all non-zero natural numbers. What is the number?
It's 1
Any number divided by 1 is constant
The set of natural numbers excluding zero is recorded as
N+
Fill in the number? 1.2.6.16. (). 120
(1+2)*2=6
(2+6)*2=16
(6+16)*2=44
(16 + 44) * 2 = 120, the result is 44
Three continuous natural numbers, the smallest is the multiple of 15, the middle is the multiple of 17, and the largest is the multiple of 19. Find these three numbers
Analysis: the three numbers 15, 17 and 19 are odd, and the difference between the two adjacent numbers is 2, so their least common multiple is still an odd number. The sum of the least common multiple plus 15, 17 and 19 is even, and the difference between the two adjacent numbers is still 2. We divide the three sums by 2, and we can get a
What is the fourth root of 1 / 16?
There are many answers. Write them all!
I is the symbol of an imaginary number. I ^ 2 = - 1? What is an imaginary number?
1/2 -1/2 1/2i -1/2i
I is the sign of an imaginary number, I ^ 2 = - 1
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