Вправи 401 - 467 » 401 (1-3)

401. Спростіть вираз: 1) 〖16x〗^(-5)/y^(-12) • (y^16/(〖2x〗^(-4) z^9 ))5 = 〖16x〗^(-5)/y^(-12) • y^80/(〖32x〗^(-20) z^45 ) = (x^(-5)• y^80)/(〖2y〗^(-12)• x^(-20)• z^45 ) = 0,5x15y92z–45; 2) (x^(-1)/(y^(-4) z^7 ))–5 : (x/(y^10 z^(-20) ))3 = x^5/(y^20 z^(-35) ) : x^3/(y^30 z^(-60) ) = x^5/(y^20 z^(-35) ) • (y^30 z^(-60))/x^3 = x2y10z–25; 3) (〖2x〗^3/(y^4 z^(-5) ))2 • (x^8/〖0,25y〗^(-9) )–2 = 〖4x〗^6/(y^8 z^(-10) ) • (x^8/(1/4 y^(-9) ))–2 = 〖4x〗^6/(y^8 z^(-10) ) • x^(-16)/〖16y〗^18 = 0,25x–10y–26z10;