Вправа 401 - 500 » 449

449. Спрости вираз. a) 6x–2c • 1,5xc–3 = (6c•1,5x)/(x^2 c^3 ) = 9/〖xc〗^2 ; б) 1,6x–1y–5 • 5/8xy = (1,6•5xy)/〖8xy〗^5 = 1/y^4 ; в) 3/4a2n–4 • 8a–3n2 = 3/4 • 8a–1n–2 = 6a–1n–2; г) 〖6x〗^(-5)/a^(-6) • a/〖36x〗^(-9) = (x^4 a^7)/6; ґ) 〖8x〗^2/z • z^(-3)/〖16x〗^(-3) = (x^5 z^(-2))/2 = 0,5x5z–2; д) 〖14c〗^(-17)/x^(-8) • x/〖7c〗^(-18) = 2cx9.