List questions from algebra-precalculus

Published on 10 Apr 2026 - 3:04

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What is $x=5$ called??

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Solution of the trigonometric equation $\sin5x =\cos2x$

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If $|ax^2+bx+c|\le \frac12$ for all $|x|\le1$, then $|ax^2+bx+c|\le x^2-\frac12$ for all $|x|\ge1$

Published on 09 Apr 2026 - 0:09

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Proving that $ (A + I)^n=(2^n-1)A + I $

Published on 01 Apr 2026 - 14:38

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An algebraic inequality with three components

Published on 24 Mar 2026 - 22:06

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Evaluating the quotient without the calculator

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How do you find the quantity that maximizes revenue?

Published on 09 Apr 2026 - 22:46

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Do there exist distinct prime numbers $p,q,r$ such that $\frac{p+q+r}{3}; \frac{p+q}2; \frac{r+q}2; \frac{p+r}2$ are prime numbers.

Published on 24 Mar 2026 - 23:51

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Solving for 4 variables using only 2 equations

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Find non-zero real numbers $a,b,c,d$ such that $a^2+c^2=b^2+d^2$ and $ab+cd=0$.

Published on 08 Apr 2026 - 22:46

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exponential equation with different bases; no logarithms

Published on 09 Apr 2026 - 7:21

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Solve for $x$: $5^{x+2} + 2^{x+1} = 2^{x+5} + 13\cdot{5^x}$

Published on 01 Apr 2026 - 22:13

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Approximate x+1 without addition and logarithms

Published on 30 Mar 2026 - 3:58

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Graph rotation: explanation of equation

Published on 08 Apr 2026 - 22:24

List Question

Find the velocity and position of the particle as function of t?

What is $x=5$ called??

Solution of the trigonometric equation $\sin5x =\cos2x$

If $|ax^2+bx+c|\le \frac12$ for all $|x|\le1$, then $|ax^2+bx+c|\le x^2-\frac12$ for all $|x|\ge1$

Proving that $ (A + I)^n=(2^n-1)A + I $

An algebraic inequality with three components

Evaluating the quotient without the calculator

How do you find the quantity that maximizes revenue?

Do there exist distinct prime numbers $p,q,r$ such that $\frac{p+q+r}{3}; \frac{p+q}2; \frac{r+q}2; \frac{p+r}2$ are prime numbers.

Solving for 4 variables using only 2 equations

Find non-zero real numbers $a,b,c,d$ such that $a^2+c^2=b^2+d^2$ and $ab+cd=0$.

exponential equation with different bases; no logarithms

Solve for $x$: $5^{x+2} + 2^{x+1} = 2^{x+5} + 13\cdot{5^x}$

Approximate x+1 without addition and logarithms

Graph rotation: explanation of equation

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