Oblicz sprytnie:
a) 1,5 do potegi 4 * 2 do potegi 5 =
b) 0,4 do potegi 6 * 5 do potegi 5 =
c) (kreska ułamkowa) (7/3) do potegi 8 * (3/7) do potegi 10 =
d) 1,2 do potegi 5 : 0,6 do potegi 6 =
Z góry dziekuje ;)
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a) 1,5 do potęgi 4 * 2 do potęgi piątej=
(1,5)⁴ × 2⁵ =
(1½)⁴ × 32 =
(³/₂)⁴ × 32=
3⁴/2⁴ × 2⁵ =
3⁴ × 2¹ =
81 × 2 =
162
b) 0.4 do potęgi szóstej * 5 do potęgi piątej =
(⅖)⁶ × 5⁵ =
2⁶/5⁶ × 5⁵ =
2⁶/5¹ =
64/5 =15625
12,8
d)1,2 do potęgi piątej : 0,6 do potęgi szótej =
(1,2)⁵ ÷ (0,6)⁶ =
(¹²/₁₀)⁵ ÷(⁶/₁₀)⁶ =
(⁶/₅)⁵ ÷ (⅗)⁶ =
6⁵/5⁵ ÷ 3⁶/5⁶ =
6⁵/5⁵ × 5⁶/3⁶ =
6⁵ × 5¹
-------- =
3⁶
(2 × 3)⁵×5
-------------- =
3⁶
2⁵×5
------- =
3¹
32×5
------ =
3
160
----- =
3
53⅓