Početní metody - LS 24/25

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Spočtěte neznámou y ze soustavy rovnic

\begin{array}{rrrrr} x & +3y & -6z & = & 4 \\-9x & -7y & -2z & = & 8 \\9x & +4y & +5z & = & 7 \end{array}

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Určete definiční obor funkce

f(x)=\sqrt{x^2-3x-40}+9\log({-4-x}).

(-\infty, -4)

❌

\langle-5,-4)\cup (8,\infty)

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(-\infty, -4\rangle

0%

\langle -5,-4)

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Žádná z předchozích odpovědí není správně.

0%

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Určete hodnost matice

A=\left(

\begin{array}{rr}

2 & -5\\

-4 & 13\\

1 & -3

\end{array}

\right).

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