Найти интервалы возрастания функции y = 60x<sup>2</sup> + 20x<sup>3</sup> - 3x<sup>5</sup> - 7,5x<sup>4</sup>:<img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.4.gif" /><img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.3.gif" /><img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.1.gif" /><img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.2.gif" /> <img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.1.gif" />, <img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.2.gif" />, <img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.3.gif" />, <img src="/close/store/examRes/%7B9B820A29-D263-43B6-ADA5-062E1898D27C%7D/prf19.4.gif" />