What is the domain of sqrt(1-21x^2) ?

The domain of sqrt(1-21x^2) is -sqrt(1/21)<= x<= sqrt(1/21)

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domain of sqrt(1-21x^2)

domain

1 - 21 x^{2}

- \frac{1}{21} \leq x \leq \frac{1}{21}

Solution steps

Find non-negative values for radicals:

- \frac{1}{21} \leq x \leq \frac{1}{21}

The function domain

- \frac{1}{21} \leq x \leq \frac{1}{21}

x^{2} + 2 x - 5

\frac{8 x ( x - 5 )}{5 x ^{2} - 34 x - 7}

f (x) = (x^{2} - 3 x + 2)

f (a) = \frac{a ^{2} + 3}{a ^{2} + 3}

f (x) = \frac{5 x - 10}{6 x - 4}

What is the domain of sqrt(1-21x^2) ?
The domain of sqrt(1-21x^2) is -sqrt(1/21)<= x<= sqrt(1/21)