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Kantura
  • Member for 9 years, 8 months
  • Last seen more than a month ago
13 votes
4 answers
4k views

How do you derive the quadratic formula using calculus?

11 votes
6 answers
4k views

Can this problem be generalised mathematically?

10 votes
10 answers
1k views

Alternative methods for solving a system of one linear one non linear simultaneous equations

7 votes
5 answers
9k views

Rotate the parabola $y=x^2$ clockwise $45^\circ$.

6 votes
3 answers
43k views

Difference between arcsin and inverse sine.

6 votes
4 answers
365 views

How do I solve $\int_{-5}^{5} \frac{x^3 \sin^2x}{x^4 +2x^2+1}\,dx$?

6 votes
4 answers
145 views

What are the solutions to: $x(x-3)=x^2 -4$?

5 votes
1 answer
143 views

Why are events $A$ and $B$ independent whilst events $A$ and $C$ are not?

4 votes
2 answers
1k views

What angle results in the shortest route across a river?

4 votes
2 answers
217 views

Probability of exactly $2$ sixes in $3$ dice rolls where $2$ dice have $6$ on $2$ faces?

3 votes
1 answer
69 views

Show that: $f(\theta)=\sin\theta\cos(\theta\ -k)$ is max when $\theta = \frac{k+90^{\circ}}{2}$ without using calculus.

3 votes
2 answers
143 views

How should these be read? $-x$ , $-(2)$ , $-2x$ , $\pm x$

3 votes
1 answer
905 views

What is the term for a line that doesn't touch a function?

3 votes
5 answers
852 views

Test for convergence of the series $\sum_{n=1}^{\infty}\frac{n}{\sqrt{n^2 +1}}$

3 votes
3 answers
376 views

Does the radical sign need the horizontal (vinculum) line for an expression with only one term ? $\surd 2$ or $\sqrt{2}$?

3 votes
3 answers
3k views

Is $[0,\infty )$ a closed interval or a half-closed interval?

3 votes
5 answers
1k views

Does $150$% chance exist?

3 votes
2 answers
561 views

Rotate $xy=1$ by $\frac{\pi}{4}$ in a negative (clockwise) direction.

3 votes
4 answers
5k views

What is this notation? f(x)=[x]=the greatest integer less than or equal to x.

2 votes
4 answers
86 views

$f(x)=\frac{x^2 -4}{x-2}$, Can $x=2$ or not? [duplicate]

2 votes
2 answers
1k views

Simplify $x^{\frac{2}{3}}+3x^{\frac{1}{3}}-2=0$ to $x^2 +45x-8=0$

2 votes
7 answers
849 views

Evaluate $\sqrt{41}$ to $n$ decimal places without using a calculator.

2 votes
2 answers
94 views

Solve the following quadratic equation: $4\tan^2(\theta)x^4-4x^2+1=0$

2 votes
2 answers
215 views

How does one integrate a function of the form: $\int \frac{x}{(a+x)^2}dx$

2 votes
2 answers
45 views

Take the function $f(x)=8x+120$. Find a function $g(x)$ which contains the point $(0,0)$ and is asymptotic to $f(x)$.

2 votes
5 answers
280 views

What's the easiest way to solve the cubic $3x^3-13x^2+3x-13$

2 votes
1 answer
3k views

Is the following data discrete or continuous?

2 votes
4 answers
332 views

If given: $0.745355992 \approx \frac{\sqrt{a}}{b} $ is it possible to find $a$ and $b$?

2 votes
0 answers
31 views

Has the mean number decreased?

2 votes
0 answers
495 views

Find the probability that exactly 2 boys are selected.

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