Real numbers - math problems
Number of problems found: 94
Calculate the reciprocal numbers for the given real numbers.
- Exponential equation
Solve exponential equation (in real numbers): 98x-2=9
- Open intervals
Open intervals A = (x-2; 2x-1) and B = (3x-4; 4) are given. Find the largest real number for which A ⊂ B applies.
- Mixing operations with numbers
Subtract twice the number -23.6 from the difference of the numbers -130 and -40.2.
- Quadratic equation
Determine the numbers b, c that the numbers x1 = -1 and x2 = 3 were roots of quadratic equation: ?
- Imaginary numbers
Find two imaginary numbers whose sum is a real number. How are the two imaginary numbers related? What is its sum?
- Distance of numbers
Which number has the same distance from the numbers -5.65 and 7.25 on the numerical axis?
By introducing a new variable solve biquadratic equation: ?
- Logarithmic equation
Solve equation: log13(7x + 12) = 0
Can the expression ? be factored into rational factors?
Use law of square roots roots: ?
- Real estate
The residential house has three entrances numbered by odd numbers arithmetic progression. The sum of the two numbers on the corner entrances is 50. Calculate the highest of these three numbers.
If the angle α is acute, and cotan α = 1/3. Determine the value of sin α, cos α, tg α.
- Cube root
Find cube root of 18
Determine missing coordinate of the point M [x, 120] of the graph of the function f bv rule: y = 5x
- Geometric mean
Calculate the geometric mean of numbers a=15.2 and b=25.6. Determine the mean by construction where a and b are the length of the lines.
Event P has probability of 0.84. What is the probability that the event P occurs in 3, 5, 7 try.
- Trigonometric functions
In the right triangle is: ? Find the value of s and c: ? ?
What is the slope of a line with an inclination 6.06 rad?
From the equation of a circle: ? Calculate the coordinates of the center of the circle S[x0, y0] and radius of the circle r.