Решите неравенство!!!!!!!

Question

Решите неравенство!!!!!!!

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Answer 1

(7/9)^2x^2 + 3x >=9/7;

(9/7)^ - 2x^2 + 3x >= (9/7)^1;
9/7 > 1;

- 2x^2 + 3x >= 1;
2x^2 - 3x  + 1<= 0;<br>2X^2 - 3X + 1 = 0;
 D = 9-8 = 1^2;
 x1 = 1;
x2 = 0,5
2(x- 0,5)(x- 1) <=0;<br>0,5 <=x <=1<br>