Examples for secondary school students
Number of problems found: 3887
- Harmonic HM example
Find the harmonic mean of 4 and 8.
Exists a function whose derivation is the same function?
- Complex conjugate
What is the conjugate of the expression 5√6 + 6√5 i? A.) -5√6 + 6√5 i B.) 5√6 - 6√5 i C.) -5√6 - 6√5 i D.) 6√5 - 5√6i
Is -10i a positive number?
- Insert 4
Insert three arithmetic means between 3 and 63.
- Reference angle
Find the reference angle of each angle:
Determine the number whose decimal logarithm is -3.8.
- What is 25
What is the trunk of 8 and 10?
- Multiples of eight
Find the sum of the first 25 multiples of 8.
C(6,3) + 3 P(6,3)
- Scalar product
Calculate the scalar product of two vectors: (2.5) (-1, -4)
Find the value of the expression: 6!·10-3
Calculate the reciprocal of z=0.8-1.8i:
Determine the discriminant of the equation: 7x²-x+7=1
- The determinant
The determinant of the unit matrix equals 7. Check how many rows the A matrix contains.
How much is the sum of the square root of six and the square root of 225?
- Determine 4314
Find the rank of each null matrix.
- Solve 6
Solve the following equations: x + 2y - z = 3 3x + 4y + z = 5 3x - y - z = 5
- Harmonic 4
Find the harmonic mean of -6 and 5.
- Harmonic mean
Harmonic means of 6 and 12