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New posts in algebra-precalculus
What is the coefficient of the $x^3$ term in the expansion of $(x^2+x-5)^7$ (See details)?
combinatorics
algebra-precalculus
multinomial-coefficients
Find minimum $n$ for $x^2+3x+6=f_1(x)^2+f_2(x)^2+ \cdots +f_n(x)^2$
algebra-precalculus
number-theory
polynomials
rational-numbers
Why and when can I just peacefully substitute into $\tan^{-1}x+\tan^{-1}y=\tan^{-1}\frac{x+y}{1-xy}$ without checking range conditions?
algebra-precalculus
trigonometry
Number of real solutions of $\begin{array}{r} {\left[\frac{2 x+1}{3}\right]+\left[\frac{4 x+5}{6}\right]} =\frac{3 x-1}{2} \end{array}$
algebra-precalculus
functions
inequality
ceiling-and-floor-functions
Evaluating $ \sum\limits_{n=1}^\infty \frac{1}{n^2 2^n} $
calculus
real-analysis
sequences-and-series
algebra-precalculus
summation
$f(x) =ax^6 +bx^5+cx^4+dx^3+ex^2+gx+h $, find $f(7)$.
algebra-precalculus
functions
polynomials
Alternative methods for solving a system of one linear one non linear simultaneous equations
algebra-precalculus
systems-of-equations
roots
quadratics
Prove that $\frac{a_1^2}{a_1+b_1}+\cdots+\frac{a_n^2}{a_n+b_n} \geq \frac{1}{2}(a_1+\cdots+a_n).$
algebra-precalculus
inequality
contest-math
Squaring both sides when units are different?
algebra-precalculus
number-theory
arithmetic
Which is greater: $1000^{1000}$ or $1001^{999}$
algebra-precalculus
inequality
arithmetic
exponentiation
rational-numbers
How to prove an Inequality
algebra-precalculus
inequality
Is there a way to prove this exponential inequality: if $a>b$ then $a^a>b^b$ for $a,b>1$?
real-analysis
algebra-precalculus
functions
inequality
exponential-function
Prove that there are infinitely many $n$ such that $2018 \mid U_n-1$
sequences-and-series
algebra-precalculus
number-theory
recurrence-relations
How do I solve $(x-1)(x-2)(x-3)(x-4)=3$
algebra-precalculus
polynomials
How can one solve the equation $\sqrt{x\sqrt{x} - x} = 1-x$?
algebra-precalculus
Why is it unacceptable to say "the range is a function of the domain"?
algebra-precalculus
If $a,b$ are roots for $x^2+3x+1=0$.Calculating $(\frac{a}{b+1})^2 +(\frac{b}{a+1})^2$
algebra-precalculus
Contradiction with Power functions with odd exponent? [duplicate]
algebra-precalculus
complex-numbers
exponentiation
radicals
fake-proofs
How to solve this in an efficient way (without calculators) [duplicate]
algebra-precalculus
polynomials
What's a fair way to share fees in a group road trip with a personal and a rental car?
algebra-precalculus
fair-division
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