The prime factor of a and B is: a = 2 * 3 * a, B = 2 * 5 * C (a, C are prime numbers). It is known that the greatest common factor of a and B is 10 and the least common multiple Next question: 210, what are the numbers a and C?

The prime factor of a and B is: a = 2 * 3 * a, B = 2 * 5 * C (a, C are prime numbers). It is known that the greatest common factor of a and B is 10 and the least common multiple Next question: 210, what are the numbers a and C?

10 divising a = 2 * 3 * a, so a is a multiple of 5, and we know that a is prime, only a = 5
And because the greatest common factor * the least common multiple = a * b = 30 * 10C = 300C,
So the least common multiple = 300C △ 10 = 30C
30C = 210, C = 7
A is 5, C is 7
210 = 2 * 3 * 5 * 7, a is a multiple of 5, C is not a multiple of 3. a=5.c=7。
The difference between the two primes is 1, and the ratio of the two primes is 1______ Their greatest common factor is______ The least common multiple is______ .
In addition to the smallest prime number 2, the minimum difference between any two prime numbers is 2. Therefore, the two prime numbers whose difference is 1 have only 2 and 3. Their greatest common factor is 1 and their least common multiple is 6. So the answer is: 2:3 or 3:2, 1, 6
The least common multiple of two prime numbers is 77. What is the sum of the two prime numbers
I'm in a hurry
77=7*11
So these two numbers are 7 and 11 and 18
The CD is on the desk?
I'm in a hurry
The CDs are on the desk.
Resonance condition of RLC series circuit (detailed)
In an AC circuit with resistor R, inductor L and capacitor C, the voltage at both ends of the circuit is different from the phase of the current. If we adjust the parameters of the circuit element (L or C) or the power frequency, we can make them have the same phase, and the whole circuit presents pure resistance. This state of the circuit is called resonance
What is the value of complex number (2 + I) (1-I) 2 / 1-2i
(1-I) 2 means the square of (1-I)
Let Z satisfy 1-z / 1 + Z = I, then / 1 + Z / =?
I already know the first question. I don't understand the second question. The answer to the second question is root 2
（2+i)(1-i)^2/(1-2i)
=-2i(2+i)/(1-2i)
=(2-4i)/(1-2i)
=2(1-2i)/(1-2i)
=2
1-z/1+z=i
1-z=i+zi
1-i=z(1+i)
z=(1-i)/(1+i)
=(1-i)^2/(1+i)(1-i)
=-2i/2
=-i
|1 + Z | = | 1-I | = radical (1 ^ 2 + 1 ^ 2) = radical 2
Finally, it's two. You solve it step by step, first calculate the square, then multiply it, and finally divide it. Be serious... And remember that the square of I is minus 1
One
What's the plural of a cookie?
Cookie cookie is also used cook.yAHD : [K &; K "& para;] D.J. [6K & ki8] K.K. [6K & ki] n. (noun) [plural] cook.ies A small, usually flat and crisp cake made from sweet dough
cookies
Cookies n. cookies and cookies both use the plural
cookies
In the circuit of measuring inductance by RLC series resonance method, voltmeters are connected to the capacitance, both ends of the inductance and the main circuit respectively. Do their readings conform to u = U1 + U2? Why?
In the circuit of measuring inductance by RLC series resonance method, voltmeters are connected to the capacitance, both ends of the inductance and the main circuit respectively. Their readings do not conform to the simple u = U1 + U2. If the vector is calculated in the formula, it is consistent
Because in alternating current, the voltage of inductance is ahead of current, and the current of capacitance is ahead of voltage. Therefore, their voltage relationship is a vector relationship, which should be solved by trigonometric method or graphic method
No
Because the voltage phase of inductance and capacitor is opposite
Given that the complex numbers of oacb corresponding to the four vertices of the parallelogram oabc are 0,3 + 2I, - 2 + 4I and Z0 respectively, the maximum value of / Z0 / satisfying / z-z0 / ≤ 1 is 0
/If Z0 = 0 - (3 + 2I,) + (- 2 + 4I) = - 5 + 2I, then z = x + Yi, then (x + 5) & sup2; + (YZ-2) & sup2; ≤ 1 can be obtained from / z-z0 / ≤ 1. Look at the straight line Z0, y = (- 2 / 5) X. circumference (x + 5) & sup2; + (Y-2) & sup2; = 1. The intersection point is Z = ((...)
(English) the plural of the German, the French, the English
Whether German is a plus or a distortion.
Germans, French / French women, English / English / English women
The complex number of germanes is directly added with s to become Germans~
I'm sure it doesn't deform~
Germany: Germany; England and France; England, France;
German: German; English and French: English, French;
German: German (s); English: Englishman; Frenchmen; plural means man becomes men; should be the root of the word. German complex number plus s.
It's all English
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