Показательная функция и ее свойства и график
Определение.
Функция, заданная формулой у = ах (где а > 0, а ≠ 1, х – показатель степени), называется показательной функцией с основанием а.
Свойства показательной функции
при а>0:
- Область определения – множество действительных чисел.
- Область значений – множество положительных действительных чисел.
- Функция возрастает на всей числовой прямой.
- При х = 0, у = 1, график проходит через точку (0; 1)
При 0 <а < 1:
- Область определения – множество действительных чисел.
- Область значений – множество положительных действительных чисел.
- Функция убывает на всей числовой прямой.
- При х = 0, у = 1, график проходит через точку ( 0 ; 1).
Свойства функции
При а >1, 0<а<1 справедливы равенства:
- ах · ау = ах+у
- ах : ау = ах-у
- (а ·в)х = ах · вх
- (а/в)х = ах/ вх
- (ах)у = аху
Вопросы к конспектам
Найдите область значений показательных функций: y = 3x
Найдите область значений функций: format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%40font-face%7Bfont-family%3A'brack_sm2882ad605b1e27be87c7468'%3Bsrc%3Aurl(data%3Afont%2Ftruetype%3Bcharset%3Dutf-8%3Bbase64%2CAAEAAAAMAIAAAwBAT1MvMi7PH4UAAADMAAAATmNtYXA3kjw6AAABHAAAADxjdnQgAQYDiAAAAVgAAAASZ2x5ZkyYQ7YAAAFsAAAAkWhlYWQLyR8fAAACAAAAADZoaGVhAq0XCAAAAjgAAAAkaG10eDEjA%2FUAAAJcAAAADGxvY2EAAEKZAAACaAAAABBtYXhwBJsEcQAAAngAAAAgbmFtZW7QvZAAAAKYAAAB5XBvc3QArQBVAAAEgAAAACBwcmVwu5WEAAAABKAAAAAHAAACDAGQAAUAAAQABAAAAAAABAAEAAAAAAAAAQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAgICAAAAAg9AMD%2FP%2F8AAABVAABAAAAAAACAAEAAQAAABQAAwABAAAAFAAEACgAAAAGAAQAAQACI5wjn%2F%2F%2FAAAjnCOf%2F%2F%2FcZdxjAAEAAAAAAAAAAAFUAFQBAAArAIwAgACoAAcAAAACAAAAAADVAQEAAwAHAAAxMxEjFyM1M9XVq4CAAQHWqwABAAAAAABVAVgAAwAfGAGwAy%2BwADyxAgL1sAE8ALEDAD%2BwAjx8sQAG9bABPBEzESNVVQFY%2FqgAAQDXAAABLAFUAAMAIBgBsAUvsAE8sAI8sQAC9bADPACwAy%2BwAjyxAAH1sAE8EzMRI9dVVQFU%2FqwAAAAAAQAAAAEAAIsesexfDzz1AAMEAP%2F%2F%2F%2F%2FVre5k%2F%2F%2F%2F%2F9Wt7mT%2FgP%2F%2FAdYBWAAAAAoAAgABAAAAAAABAAABVP%2F%2FAAAXcP%2BA%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%2F8AAo2FAA%3D%3D)format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%40font-face%7Bfont-family%3A'bracketse552f5417ff4680c6b50499'%3Bsrc%3Aurl(data%3Afont%2Ftruetype%3Bcharset%3Dutf-8%3Bbase64%2CAAEAAAAMAIAAAwBAT1MvMi7RIisAAADMAAAATmNtYXBi7uzYAAABHAAAAExjdnQgBAkDLgAAAWgAAAASZ2x5Zo64f%2BkAAAF8AAABSWhlYWQLniGcAAACyAAAADZoaGVhBK4XLAAAAwAAAAAkaG10eCWq%2F90AAAMkAAAAFGxvY2EAABknAAADOAAAABhtYXhwBJIESAAAA1AAAAAgbmFtZRAA8I4AAANwAAAB3nBvc3QBwwDgAAAFUAAAACBwcmVwupWEAAAABXAAAAAHAAACggGQAAUAAAQABAAAAAAABAAEAAAAAAAAAQEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACAgICAAAAAg9AMEAAAAAAADgAAAAAAAAAACAAEAAQAAABQAAwABAAAAFAAEADgAAAAKAAgAAgACI5sjnSOeI6D%2F%2FwAAI5sjnSOeI6D%2F%2F9xm3GXcZdxkAAEAAAAAAAAAAAAAAAABVABWAQAALACoA4AAMgAHAAAAAgAAACoA1QNVAAMABwAANTMRIxMjETPV1auAgCoDK%2F0AAtUAAQAAAAABgAOAAAUAJBgBsAAvsAPFsQEC%2FbADELEEBP0AsQAAP7ABPLEEBj%2BwAzwwMTEzEAEjAFUBKyv%2BqwH8AYT%2BqgABAAAAAAGAA4AABQAmGAGwAC6wA8WxBQL9sAMQsQIE%2FQB8sQAGPxiwBTyxAwb2sAI8MDEREgEzABMBAVQr%2FtMCA4D91v6qAYQB%2FAAB%2F6wAAAEsA4AABQAnGAGwAC%2BwBzywA8WxAQL9sAMQsQQE%2FQCxAAA%2FsAE8sQQGP7ADPDAxISMSATMAASxVAf7UKwFVAfwBhP6rAAH%2FrAAAASwDgAAFACkYAbABL7AHPLAExbEAAv2wBBCxAwT9AHyxAQY%2FsAA8GLEEAD%2BwAzwwMRMzEAEjANdV%2FqsrASsDgP3V%2FqsBhgAAAAABAAAAAQAAeuTcpl8PPPUAAwQA%2F%2F%2F%2F%2F9Wt7o7%2F%2F%2F%2F%2F1a3ujv%2BsAAABgAOAAAAACgACAAEAAAAAAAEAAAOAAAAAABdw%2F6z%2FrAGAAAEAAAAAAAAAAAAAAAAAAAAFANUAAAEsAAABLAAAASz%2FrAEs%2F6wAAAAAAAAAJAAAAGgAAACzAAAA%2FQAAAUkAAQAAAAUACAACAAAAAAACAIAEAAAAAAAEAAA%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%2FAAGNhQA%3D)format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%223.5%22%20y%3D%2221%22%3Ey%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22math190bc3972c7934354efb2af01e7%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2213.5%22%20y%3D%2221%22%3E%3D%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22math190bc3972c7934354efb2af01e7%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2225.5%22%20y%3D%2221%22%3E%26%23x2212%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22bracketse552f5417ff4680c6b50499%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2232.5%22%20y%3D%2212%22%3E%26%23x239B%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22brack_sm2882ad605b1e27be87c7468%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2232.5%22%20y%3D%2216%22%3E%26%23x239C%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22brack_sm2882ad605b1e27be87c7468%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2232.5%22%20y%3D%2220%22%3E%26%23x239C%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22bracketse552f5417ff4680c6b50499%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2232.5%22%20y%3D%2231%22%3E%26%23x239D%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22bracketse552f5417ff4680c6b50499%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2251.5%22%20y%3D%2212%22%3E%26%23x239E%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22brack_sm2882ad605b1e27be87c7468%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2251.5%22%20y%3D%2216%22%3E%26%23x239F%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22brack_sm2882ad605b1e27be87c7468%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2251.5%22%20y%3D%2220%22%3E%26%23x239F%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22bracketse552f5417ff4680c6b50499%22%20font-size%3D%2212%22%20text-anchor%3D%22start%22%20x%3D%2251.5%22%20y%3D%2231%22%3E%26%23x23A0%3B%3C%2Ftext%3E%3Cline%20stroke%3D%22%23B94A48%22%20stroke-linecap%3D%22square%22%20stroke-width%3D%221%22%20x1%3D%2238.5%22%20x2%3D%2248.5%22%20y1%3D%2216.5%22%20y2%3D%2216.5%22%2F%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2243.5%22%20y%3D%2212%22%3E1%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2243.5%22%20y%3D%2228%22%3E2%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%229%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%2258.5%22%20y%3D%228%22%3Ex%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22math190bc3972c7934354efb2af01e7%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2268.5%22%20y%3D%2221%22%3E%2B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2277.5%22%20y%3D%2221%22%3E1%3C%2Ftext%3E%3C%2Fsvg%3E)
Найдите область значений функций: format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%223.5%22%20y%3D%2220%22%3Ey%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22math143f4d31b04031e49f5eb18baba%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2213.5%22%20y%3D%2220%22%3E%3D%3C%2Ftext%3E%3Cline%20stroke%3D%22%23B94A48%22%20stroke-linecap%3D%22square%22%20stroke-width%3D%221%22%20x1%3D%2220.5%22%20x2%3D%2230.5%22%20y1%3D%2215.5%22%20y2%3D%2215.5%22%2F%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2225.5%22%20y%3D%2211%22%3E1%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2225.5%22%20y%3D%2227%22%3E2%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22math143f4d31b04031e49f5eb18baba%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2238.5%22%20y%3D%2220%22%3E%26%23x2212%3B%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%2212%22%20text-anchor%3D%22middle%22%20x%3D%2247.5%22%20y%3D%2220%22%3E2%3C%2Ftext%3E%3Ctext%20fill%3D%22%23B94A48%22%20font-family%3D%22Arial%22%20font-size%3D%229%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%2253.5%22%20y%3D%2215%22%3Ex%3C%2Ftext%3E%3C%2Fsvg%3E)
Найдите область значений функций: y = 17x-1
Найдите область значений функций: y = 2|x|-1
Найдите область значений функций: y = -2|x|-1
Последнее изменение: Среда, 1 Февраль 2017, 19:04