Найти интервалы возрастания функции y = 6x<sup>5</sup> + 7,5x<sup>4</sup> - 10x<sup>3</sup> - 15x<sup>2</sup> + 7:<img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf9.1.gif" /><img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf9.4.gif" /><img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf9.3.gif" /><img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf9.2.gif" /> <img src="/img/65/8638f20e2bdde1a1f7899c2406.gif" />, <img src="/img/ba/646dfb057493a5f7778516d0eb.gif" />, <img src="/img/56/0f96a4d178106a5d35d5b15ab8.gif" />, <img src="/img/3a/308faae73433c33ff8b2d26770.gif" />