Решение внутри
+ график
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подставляем координаты точки: k(-1)^2+3*(-1)-4=2; k-3-4=2; k-7=2; k=7+2; k=9. Ответ: k=9.
1)0,5:0,125=4
2)7/5:1 4/7=7/5*7/11=49/55
3)4+49/55-3/11=4 49/55-15/55=4 34/55
4)4 34/55:3=254/55*1/3=254/165
5)1,5+0,25=1,75
6)1 3/4:18 1/3=7/4*3/55=21/220
7)254/165:21/220=254/165*220/21=(254*4)/(3*21)=1016/63=16 8/63
<span>1) упорядочим ряд:
56; 58;62, 64; 66; 74
медиана равна (62+64):2 = 63
2)
0,4; 0,5;0,5; 0,6; 0,7 0,7; 0,8
МЕДИАНА =0,6</span>
![f(\frac{1}{x})=(\frac{1}{x})^{-5}=(x^{-1})^{-5}=x^{5}\\\\f(\frac{1}{x})<9x^{8}*f(x)\\\\x^{5}<9x^{8}*x^{-5}\\\\x^{5}<9x^{3} \\\\x^{5}-9x^{3}<0\\\\x^{3}(x^{2}-9)<0\\\\x^{3}(x-3)(x+3)<0](https://tex.z-dn.net/?f=f%28%5Cfrac%7B1%7D%7Bx%7D%29%3D%28%5Cfrac%7B1%7D%7Bx%7D%29%5E%7B-5%7D%3D%28x%5E%7B-1%7D%29%5E%7B-5%7D%3Dx%5E%7B5%7D%5C%5C%5C%5Cf%28%5Cfrac%7B1%7D%7Bx%7D%29%3C9x%5E%7B8%7D%2Af%28x%29%5C%5C%5C%5Cx%5E%7B5%7D%3C9x%5E%7B8%7D%2Ax%5E%7B-5%7D%5C%5C%5C%5Cx%5E%7B5%7D%3C9x%5E%7B3%7D+%5C%5C%5C%5Cx%5E%7B5%7D-9x%5E%7B3%7D%3C0%5C%5C%5C%5Cx%5E%7B3%7D%28x%5E%7B2%7D-9%29%3C0%5C%5C%5C%5Cx%5E%7B3%7D%28x-3%29%28x%2B3%29%3C0)
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- 3 0 3
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x ∈ (- ∞ ; - 3) ∪ (0 ; 3)