Korzystajac z własnosci dzialan na potegach oblicz wartosc wyrazenia:
a) 2*3do potegi 6 5*3 do potegi 5 -6*3 do potegi 4
b)7 do potegi 5 * (7 do potegi -4)do potegi 2 :7 do potegi -3 / (cale rownanie jest pod ulamiekiem) na dole pisze 7*7 do potegi -4 :7 do potegi -2
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2× 3⁶ + 5 × 3⁵ - 6 × 3⁴= 3⁴×(2×3²+ 5×3 -6)= 3⁴ × 27 = 3⁴×3³=3⁷=2187
(7⁵×7⁻⁴/7⁻³)/ (7×7⁻⁴/7⁻²) = 7⁰/ 7⁻¹=1/(1/7)= 7