New posts in algebra-precalculus

Rewriting $\sqrt{h(h+1)}-h$ into $\frac{h(h+1)-h^2}{\sqrt{h(h+1)}+h}$

algebra-precalculus

Does $f(a,b)$ being directly proportional to $a$ and $b$ separately imply that $f(a,b)$ is directly proportional to $ab?$

algebra-precalculus functions

If $(ax+2)(bx+7)=15x^2+cx+14$ for all values of $x$, and $a+b=8$, what are two possible values for $c$? [closed]

algebra-precalculus

Can this function be rewritten to improve numerical stability?

algebra-precalculus functions numerical-methods

If $2^x=3^y=6^{-z}$ then prove that:$ \frac{1}{x}+\frac{1}{y}+\frac{1}{z}=0$

algebra-precalculus systems-of-equations

Find $\lfloor {\alpha}^6 \rfloor$

algebra-precalculus polynomials roots

Quartic Equation Solution and Conditions for real roots?

algebra-precalculus polynomials

Question on geometrical proof of Geometric Series

sequences-and-series geometry algebra-precalculus

Find $(a,b)$ if $x^2-bx+a = 0, x^2-ax+b = 0$ both have distinct positive integers roots

algebra-precalculus number-theory elementary-number-theory diophantine-equations quadratics

Wave Equation by separation of variables

linear-algebra algebra-precalculus partial-differential-equations wave-equation

Hard integral to find

calculus integration algebra-precalculus

Is there any known relationship between $\sum_{i=1}^{n} f(i)$ and $\sum_{i=1}^{n} \dfrac {1}{f(i)}$

calculus sequences-and-series algebra-precalculus

Is this proportionality proof erroneous?

algebra-precalculus physics

Nested sine and cosine half angle formulas [closed]

algebra-precalculus trigonometry nested-radicals

Is there an explanation why the reflection of $f(x)$ through y = x is its inverse?

algebra-precalculus

How do I combine $-\ln(a)-\ln(b)$?

algebra-precalculus logarithms

Fermat's Last Theorem for Negative $n$

algebra-precalculus number-theory pythagorean-triples

A polynomial determined by two values

algebra-precalculus polynomials contest-math

Is this a known algebraic identity?

algebra-precalculus probability polynomials

Is the following generalization of Cauchy-Schwarz inequality true?

algebra-precalculus inequality proof-writing solution-verification cauchy-schwarz-inequality