1.Oblicz stosując prawa działań na potęgach
a) {
b)
c)
odp:
a)= 1/4
b)=1
c)=9
2.Oblicz
a)
Podałam Wam odpowiedzi oprócz zad 2, za dokładne obliczenia i wszystko daje Naj !
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zad.1
a){[(-2)²]⁻³-(2⁴)⁻²}*21⅓=[(-2)⁻⁶-(2⁻⁸)]*64/3=[(-½)⁶-(½)⁸]*64/3=
=(1/64-1/256)*64/3=(4/256-1/256)*64/3=3/256*64/3=1/4
b)-(-1⁻⁴)¹⁵-[-(-1)³]⁷-1¹²*(-1⁶)⁻¹¹=-(-1⁻⁶⁰)-[-(-1)²¹]-1*(-1⁻⁶⁶)=
=-(-1)-[-(-1)]-(-1)=1-(-1)+1=1
c)(3⁵)⁻⁹*[(⅓)⁻²]⁷:(3⁻³)⁻⁵*[(-⅓)⁻⁶]⁸=3⁻⁴⁵*3¹⁴:3¹⁵*3⁴⁸=3^(⁻⁴⁵+¹⁴-¹⁵+⁴⁸)=3^(⁻⁴⁶+⁴⁸)=3²=9
zad.2
a)(5⁻¹+5)²-(1/25)⁻¹:5⁻²-5⁻²=(1/5+5)²-25:1/25-1/25=
=((1+25)/5)²-625-1/25=(676-15625-1)/25=-14950/25=-598