
Find the first three terms in the expansion of:
\((4a - 2b)^5\)
\(=1024a^5 - 2560a^4b \\+2560a^3b^2 ...\)
If £220 is invested with an interest rate of 5% compounded quarterly, find the value of the investment after 6 years. £296.42
Here are the coordinates of 3 vertices of a square, what are the coordinates of the 4th?
\((5,5),(8,10),(0,8)\)
(3,13)
\( X \sim N(43, 7^2)\)
Find
\( P(32\lt X \lt45) \)
\(0.554\)
Factorise:
\(x^2-x-2\)
\((x+1)(x-2)\)
Factorise:
\(5x^2+7x-6\)
\((x+2)(5x-3)\)
Draw a rough sketch of the graph of:
\(y=-2x+2\)
Gradient -2
y intercept 2
What is the value of:
\(1^{-3}\)
\(= 1\)
Find angle BCA if AC = 4.5m and BC = 6.1m. 42.5o
Find BC if angle BCA = 44o and AC = 5.5m. 7.65m
Describe the red region.
\(y = 9x^3 - 8x^2 + 6x\)
Find \( \dfrac{dy}{dx}\)
\(27x^2 - 16x + 6\)
\(y = \dfrac{9}{x^{8}} - 8\sqrt[9]{x}\)
Find \( \frac{dy}{dx}\)
\(-\frac{72}{x^{9}} - \frac{8}{9}x^{-\frac{8}{9}}\)
\(y=(3x+8)^4\)
Find \( \dfrac{dy}{dx}\)
\(12(3x+8)^3\)
\(y=6x^2e^x\)
Find \( \dfrac{dy}{dx}\)
\(12xe^x+6x^2e^x\)
\(y=\frac{ \ln x}{x^2}\)
Find \( \dfrac{dy}{dx}\)
\(\frac{(1-2lnx)}{x^3}\)
Find the equation of the tangent to the curve:
\(y = -4x^2 + 8x - 5\)
where \(x = -1\)
\(y = 16x - 1\)
Find the equation of the normal to the curve:
\(y = -4x^2 + 8x - 5\)
where \(x = -1\)
\(y = -\frac{x}{16} - \frac{273}{16}\)
\(y =9x^2 - 12x + 6\)
Find \( \int y \quad dx\)
\(3x^3 - 6x^2 + 6x+c\)
A game is played 18 times and the probability of winning is 0.9. Calculate the probability of winning exactly 4 times. 0.0000000000201
Make up a maths question using this:
\( \int \dfrac{1}{x} = \ln |x| + c\)
Reciprocal Integral formula
What letter is this?
Two terms of an arithmetic sequence:
\(u_{6} = 49\)
\(u_{18} = 181\)
Find the sum of the first 25 terms.3150
Find the equations of the asymptotes of:
\(y=\dfrac{10-2x}{10x}\)
\(x=0,y=-\frac{1}{5}\)
In the triangle ABC,
AB = 8.4cm.
BC = 9.9cm.
CA = 9.2cm.
Find angle CÂB.
68.3°
Evaluate:
$$\sum_{n=1}^{6} 84 - n^2$$
413
\(f(x)=2x^2+2x-1\)
What is the value of the discriminant and what does it indicate?
12, Two distinct roots
\(f(x)=x^2-5x+5\)
By completing the square find the coordinates of the vertex.
(2.5, -1.25)
Write the following in terms of logs to base 10:
\(\log_a(z)\)
\( \dfrac{\log_{10}(z)}{\log_{10}(a)}\)
Find the integral:
\(\int \cos(x)e^{\sin(x)} \;dx\)
\(e^{\sin(x)}+c\)
Find the equation of the straight line that passes through:
(-7, 28) and (9, -20)
\(y=-3x+7\)
Find the inverse of the function \(f\):
\(f(x)= \sqrt{x}-3\)
\((x+3)²\)
\(f(x)=5x+1 \\ g(x)=x^2 \\[1cm] \text{Find }gf(3x)\)
\(225x^2+30x+1\)
Write in standard form:
\((a \times 10^3) \div (b\times 10^5)\)
where \(a \div b \) is a two digit number \((10 \le \frac{a}{b} \lt 100)\)
\(\frac{a}{10b}\times10^{-1}\)
Draw a rough sketch of
\(x=\pm \sqrt{y}\)
Sketch a height-time graph as this jar is filled.
Without a calculator find the exact value of
$$\tan{45°} - \sin{\frac{\pi}{6}} - \cos{\frac{\pi}{3}}$$\(0\)
Without a calculator find the exact value of
$$\sin{\dfrac{13\pi}{6}}$$\(\dfrac{1}{2}\)
Solve:
\(2d+3e-4f = 13 \\ d-e-f= -7\\ 9d+2e-2f=42\)
d = 4, e = 7, f = 4
Find the area of a sector with radius 3.4cm and angle \( \frac{\pi}{3}\)
🍕
6.05cm2
How many ways can fifteen children sit in a row without the youngest being in the middle?
1220496076800
Find the equations of the asymptotes of:
$$y=\dfrac{8x^2-19x-15}{1-2x}$$x=1/2,y=15/2-4x
The first term of a geometric sequence is 30 and the fourth term is twice this value. What is the common ratio?
\( \sqrt[3]{2} \)
Find the first 4 terms in the expansion of:
\(\dfrac{1}{\sqrt{4+x}}\)
\(\frac{1}{2}-\frac{x}{16}+\frac{3x^2}{256}-\frac{5x^3}{2048}\)
Evaluate:
\(\int^{80}_{40} \dfrac{1}{x} dx\)
\(\ln{2} \approx 0.693\)
Tin A contains 3 red balls and 6 green balls. Tin B contains 8 red balls and 11 green balls. A dice is thrown and if the score is less than 3 a ball is selected from tin A; otherwise a ball is selected from tin B. Given that the ball selected was red, calculate the probability that it came from tin B.
\(\frac{48}{67}\)
Find the angle between two unit vectors \(u\) and \(v\) such that the vectors \(2u-3v\) and \(5u+2v\) are perpendicular. Give you answer correct to the nearest degree.
\( 69^o \)
Simplify
$$ \sqrt{5-12i} $$
\(3-2i \; \text{ or } -3+2i\)
Evaluate:
\(\int (2x+1)e^{-x}\; dx\)
\(-\frac{2x+3}{e^x}+c\)
Simplify:
$$\cosec{x}\tan{x}$$\(\sec{x}\)
$$ \DeclareMathOperator{cosec}{cosec} $$Find the volume of revolution when \(y=x(4-x)\) is rotated about the x-axis for \(0 \le x \le 4\)
\(\frac{512\pi}{15}\) cubic units
What is the difference between a rational and an irrational number?
Rational can be expressed as a fraction with integer numerator and denominator
Show how the first four terms of the Maclaurin series are obtained for
\(f(x) = \frac{1}{1-x}\)
\(1 + x + x^2 + x^3\)
Expand and simplify:
$$ (i-\sqrt{3})^5 $$
\(16\sqrt{3} + 16i \\ \text{or } 16(\sqrt{3} + i)\)
Of the 22 people on boat, 3 are professional singers. If 4 people get sea sick, determine the chance that all three singers do not.
204/385 or 53.0%
Prove by mathematical induction that the sum of the first \( n \) natural numbers is \( \frac{n(n + 1)}{2} \)
Show true for n=1, assume true for n=k, prove for n=k+1
Simplify:
$$\sqrt{48}$$
\(4\sqrt{3}\)
Simplify:
$$\dfrac{2}{\sqrt{10}}$$\(\frac{2\sqrt{10}}{10} = \frac{\sqrt{10}}{5}\)
Simplify
\((2 - 2\sqrt{2})^2\)
\(12 - 8\sqrt{2}\)
Simplify:
$$\dfrac{3}{7 - \sqrt{2}}$$\(\frac{21 + 3\sqrt{2}}{47}\)
Calculate the standard deviation of the following numbers:
21, 21, 21, 29, 29, 29
4
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