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question:Maria gave a quarter of her money to her friend Isha. Isha decided to first square the amount she received from Maria before giving half of it to Florence. Florence then received twice as much money as Maria's cousin Rene, and onethird of what Florence received was given to Maria's brother John, who then decided to halve it before giving half to their friend Emma. If Rene received 600, how much money did Maria distribute among her five friends (Isha, Florence, Rene, John, and Emma), and consider the conditions followed by each one?
answer:Let's break down the problem step by step: 1. Rene received 600. 2. Florence received twice as much as Rene, so Florence received 2 * 600 = 1200. 3. Isha gave half of the squared amount to Florence. Let's denote the amount Isha received from Maria as x. Then, (x^2) / 2 = 1200. To find x, we solve for x: x^2 = 1200 * 2 x^2 = 2400 x = sqrt(2400) x = 49 (approximately, since the square root of 2400 is not a whole number, but we'll use the approximate value for the sake of the calculation). 4. Maria gave a quarter of her money to Isha, so the total amount Maria had was 4 * x. Let's denote Maria's total money as M: M = 4 * x M = 4 * 49 M = 196 (approximately). 5. John received one-third of what Florence received, so John got 1200 / 3 = 400. 6. John then halved it, getting 400 / 2 = 200, and gave half to Emma, so Emma received 200 / 2 = 100. Now, let's add up the amounts received by each friend to find out how much money Maria distributed: - Isha received approximately 49. - Florence received 1200. - Rene received 600. - John received 200 (before giving half to Emma). - Emma received 100. Total distributed = Isha + Florence + Rene + John + Emma Total distributed ≈ 49 + 1200 + 600 + 200 + 100 Total distributed ≈ 2149 So, Maria distributed approximately boxed{2149} among her five friends.
question:Compute (dbinom{30}{3})^2.
answer:First, calculate the binomial coefficient dbinom{30}{3}: [ dbinom{30}{3} = dfrac{30!}{27!3!} = dfrac{30 times 29 times 28}{3 times 2 times 1} = dfrac{24360}{6} = 4060. ] Next, square this result to find (dbinom{30}{3})^2: [ (dbinom{30}{3})^2 = 4060^2 = 16483600. ] Thus, the solution to the problem is: [ boxed{16483600}. ]
question:Given the function f(x)=sin ωx+acos ωx (ω > 0) whose graph is symmetric about the point M(frac{π}{3},0), and the function has a minimum value at x=frac{π}{6}, find a possible value of a+ω in the interval [0,10].
answer:Since the function f(x)=sin ωx+acos ωx=sqrt{1+a^2}left(frac{1}{sqrt{1+a^2}}sin ωx+frac{a}{sqrt{1+a^2}}cos ωxright)=sqrt{1+a^2}sin(ωx+φ) (tan φ=a) is symmetric about the point M(frac{π}{3},0), we have frac{π}{3}ω+φ=kπ (k∈mathbb{Z}), (①) Also, the function has a minimum value at x=frac{π}{6}, so frac{π}{6}ω+φ=frac{3π}{2}+2kπ (k∈mathbb{Z}), (②) Solving the system of equations (①) and (②), we obtain ω=-9-6k and φ=kπ+3π (k∈mathbb{Z}). Thus, a=tan(kπ+3π)=0, And a+ω=-9-6k (k∈mathbb{Z}). Given that a+ω∈[0,10], we have k=-2 and a+ω=3. Therefore, the answer is boxed{3}. By analyzing the function and utilizing its symmetry, we can derive ω=-9-6k and φ=kπ+3π (k∈mathbb{Z}). From this, we can calculate a and subsequently a+ω=-9-6k (k∈mathbb{Z}), which enables us to find the answer. This problem primarily evaluates the understanding of the symmetry point, symmetry axis, and period of a sine and cosine function, making it a moderately difficult question.
question:f the complex number m3+(m^{2}9)igeqslant 0, then the value of the real number m is ______.
answer:To solve the given problem, we start by analyzing the given inequality involving a complex number: m-3+(m^{2}-9)igeqslant 0 This inequality involves both real and imaginary parts of a complex number. For a complex number to satisfy this inequality, both the real part and the imaginary part must satisfy certain conditions. First, let's separate the real and imaginary parts: 1. Real part: m-3 2. Imaginary part: m^{2}-9 Given that the inequality involves a complex number, we interpret the conditions for the real and imaginary parts separately: 1. For the imaginary part m^{2}-9 to not affect the inequality (since an inequality cannot directly apply to complex numbers as it does to real numbers), it must be equal to 0. This gives us the equation: m^{2}-9=0 Solving this equation for m gives: m^{2}=9 m=pm3 2. For the real part m-3 to satisfy the inequality, it must be greater than or equal to 0. This gives us the inequality: m-3geqslant 0 Solving this inequality for m gives: mgeqslant 3 Combining these two conditions, we find that m must satisfy both m=pm3 from the imaginary part condition and mgeqslant 3 from the real part condition. The only value of m that satisfies both conditions is m=3. Therefore, the value of the real number m is boxed{3}.