Question

Сделайте 3 5 и 7 задание)">

Answer 1

$\boldsymbol{3)} \: \: \sqrt{ {125}^{2} - {120}^{2} } \\ \sqrt{(125 - 120) \times (125 + 120)} \\ \sqrt{5 \times 245} \\ \sqrt{1225} \\ 35$

$\boldsymbol{5)} \: \: \sqrt[5]{7x + 4} = 2 \\ 7x + 4 = 32 \\ 7x = 32 - 4 \\ 7x = 28 \\ x = 4$

$\boldsymbol{7)} \: \: y= {5x}^{4} - 3x + 5 \\ y' = \frac{d}{dx} ( {5x}^{4} - 3x + 5) \\ y' = \frac{d}{dx} ( {5x}^{4} ) + \frac{d}{dx} ( - 3x) + \frac{d}{dx} (5) \\ y' = 5 \times {4x}^{3} - 3 + 0 \\ y' = {20x}^{3} - 3$

Answer 2

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