
Find the first three terms in the expansion of:
\((2a - 4b)^5\)
\(=32a^5 - 320a^4b \\+1280a^3b^2 ...\)
If £160 is invested with an interest rate of 3% compounded quarterly, find the value of the investment after 6 years. £191.43
Here are the coordinates of 3 vertices of a square, what are the coordinates of the 4th?
\((2,2),(8,5),(-1,8)\)
(5,11)
\( X \sim N(27.1, 1.8^2)\)
Find
\( P(28.1\lt X \lt29.1) \)
\(0.156\)
Factorise:
\(x^2-2x-8\)
\((x+2)(x-4)\)
Factorise:
\(3x^2+7x-6\)
\((x+3)(3x-2)\)
Draw a rough sketch of the graph of:
\(y=-2x\)
Gradient -2
y intercept 0
What is the value of:
\(27^{\frac{1}{3}}\)
\(= 3\)
Find angle BCA if AB = 5.3m and BC = 6.6m. 53.4o
Find AC if angle ABC = 57o and AB = 4.2m. 6.47m
Describe the red region.
\(y = 7x^3 - 6x^2 + 9x\)
Find \( \dfrac{dy}{dx}\)
\(21x^2 - 12x + 9\)
\(y = \dfrac{4}{x^{9}} - 8\sqrt[9]{x}\)
Find \( \frac{dy}{dx}\)
\(-\frac{36}{x^{10}} - \frac{8}{9}x^{-\frac{8}{9}}\)
\(y=(3x^2-5)^6\)
Find \( \dfrac{dy}{dx}\)
\(36x(3x^2-5)^5\)
\(y=9x^2e^x\)
Find \( \dfrac{dy}{dx}\)
\(18xe^x+9x^2e^x\)
\(y=\frac{x+5}{x-3}\)
Find \( \dfrac{dy}{dx}\)
\(-\frac{8}{(x-3)^2}\)
Find the equation of the tangent to the curve:
\(y = -5x^2 + 7x - 3\)
where \(x = 2\)
\(y = 17 - 13x\)
Find the equation of the normal to the curve:
\(y = 5x^2 + 7x + 3\)
where \(x = 1\)
\(y = 15\frac{1}{17} - \frac{x}{17}\)
\(y =9x^2 - 6x + 4\)
Find \( \int y \quad dx\)
\(3x^3 - 3x^2 + 4x+c\)
A game is played 11 times and the probability of winning is 0.4. Calculate the probability of winning exactly 7 times. 0.0701
Make up a maths question using this:
\( \triangle = b^2-4ac\)
Quadratic equation discriminant
What letter is this?
Two terms of an arithmetic sequence:
\(u_{10} = -8\)
\(u_{15} = -13\)
Find the sum of the first 23 terms.-230
Find the equations of the asymptotes of:
\(y=3\left(\dfrac{2x+3}{7-x}\right)\)
\(x=7,y=-6\)
In the triangle ABC,
AB = 8.9cm.
BC = 5.9cm.
CÂB = 40.6°.
Find angle BĈA.
78.9° or 101.1°
Evaluate:
$$\sum_{n=2}^{9} 73 - n^2$$
300
\(f(x)=5x^2-6x-4\)
What is the value of the discriminant and what does it indicate?
116, Two distinct roots
\(f(x)=x^2+3x+9\)
By completing the square find the coordinates of the vertex.
(-1.5, 6.75)
Solve for x:
\(\log_3x = 2\)
9
Find the integral:
\(\int \cos(x)e^{\sin(x)} \;dx\)
\(e^{\sin(x)}+c\)
Find the equation of the straight line that passes through:
(-6, -18) and (8, 24)
\(y=3x+0\)
Find the inverse of the function \(f\):
\(f(x)= \sqrt{x+12}\)
\(x²-12\)
\(f(x)=2x+3 \\ g(x)=2x^2 \\[1cm] \text{Find }fgf(x)\)
\(16x^2+48x+39\)
Write in standard form:
\(a \times 10^{-1} \times b\times 10^{-1}\)
where \(a \times b \) is a three digit number \((100 \le ab \lt 1000)\)
\(\frac{ab}{100}\times10^0\)
Draw a rough sketch of
\(y=x^3-4x\)
Sketch a height-time graph as this jar is filled.
Without a calculator find the exact value of
$$\tan{30°} \times \tan{\frac{\pi}{3}}$$\(1\)
Without a calculator find the exact value of
$$\tan{\dfrac{19\pi}{3}}$$\(\sqrt{3}\)
Solve:
\(2x+y-3z= -12 \\ 3x+y+z= 20 \\ x-y+2z = 17\)
x = 4, y = 1, z = 7
Find the area of a sector with radius 4.9cm and angle \( \frac{\pi}{4}\)
🍕
9.43cm2
How many ways can thirteen children sit in a row without the youngest being in the middle?
5748019200
Find the equations of the asymptotes of:
$$y=\dfrac{x^2+x-6}{x-1}$$x=1,y=x+2
The 7th term of a geometric sequence is 8192 and the sum of the first 7 terms is 10922. Find the first term.
2
Find the first 4 terms in the expansion of:
\(\dfrac{1}{2-x}\)
\(\frac{1}{2}+\frac{x}{4}+\frac{x^2}{8}+\frac{x^3}{16}\)
Evaluate:
\(\int^{3}_{0} e^x dx\)
\(e^{3}- 1 \approx 19.1\)
Every family in Happyland has either has a car or a motor scooter or both. 72% of the families have a car. 87% of the families have a scooter. A family is selected at random and it is found that they have a car. Find the probability they also have a scooter.
\(\dfrac{59}{72}\)
Find the point of intersection of \(L_1\) and \(L_2\) if:
\(L_1: \quad \dfrac{x+4}{3} = y-2 = \dfrac{z+1}{2} \)
\(L_2: \quad x = \dfrac{y-5}{2} = \dfrac{-z-1}{2} \)
\( (-1,3,1) \)
Simplify
$$ \dfrac{3+2i}{4-i}$$
\(\frac{10}{17}+\frac{11}{17}i\)
Evaluate:
\(\int x\cos{x}\; dx\)
\(xsinx+cosx+c\)
Simplify:
$$\dfrac{\cot{x}}{\cosec{x}}$$\(\cos{x}\)
$$ \DeclareMathOperator{cosec}{cosec} $$Find the volume of revolution when \(y=\frac{1}{x}\) is rotated about the x-axis for \(1 \le x \le 2\)
\(\frac{\pi}{2}\) cubic units
What is the binomial theorem?
Clue: Expand \( (a + b)^n \)
Show how the first four terms of the Maclaurin series are obtained for
\(f(x) = \frac{1}{1-x}\)
\(1 + x + x^2 + x^3\)
Solve for \(z\)
$$ z^4 = - 16 $$
\(\sqrt{2}+i\sqrt{2},-\sqrt{2}+i\sqrt{2} \\ \sqrt{2}-i\sqrt{2},-\sqrt{2}-i\sqrt{2}\)
6 girls sit at random on 6 seats in a row. Determine the probability that the two friends Karen and Julie sit at the ends of the row.
1/15 or 6.67%
Prove by mathematical induction that \( 11^n - 6 \) is divisible by 5 for all natural numbers \( n \)
Show true for n=1, assume true for n=k, prove for n=k+1
Simplify:
$$\sqrt{50}$$
\(5\sqrt{2}\)
Simplify:
$$\dfrac{5}{2\sqrt{3}}$$\(\frac{5\sqrt{3}}{6}\)
Simplify
\(7\sqrt{13} - 9\sqrt{13}\)
\(-2\sqrt{13}\)
Simplify:
$$\dfrac{5}{3 - \sqrt{2}}$$\(\frac{15 + 5\sqrt{2}}{7}\)
Calculate the standard deviation of the following numbers:
6, 10, 12, 14, 18
4
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