Odpowiedzi

Najlepsza Odpowiedź!
2010-01-26T16:18:44+01:00
A
zad. 7
a) √45 = √9*5 = √9 * √5 = 3√5
b) √88 = √4*22 = √4 * √22 = 2√22
c) √108 = √36*3 = √36 * √ 3 = 6√3

zad. 8
a) 2√31 = √2² * √31 = √4*31 = √124
b) 5√2 = √5² * √2 = √25*2 = √50
c)10√7 = √10² * √7 = √100*7 = √700
d) 1/5√75 = √(1/5)² * √75 = √1/25*75 = 75/25 = √3
e) 0,3√1000 = √(0,3)² * √1000 = √0,09*1000 = √90

B
zad.7
a) √300 = √100*3 = √100 * √3 = 10*√3 = 10√3
b) √98 = √49*2 = √49 * √2 = 7*√2 = 7√2
c) √360 = √36*10 = √36 * √10 = 6*√10 = 6√10
d) √0,04 = √4*0,01 = √4 * √0,01 = 2*√0,01 = 2√0,01

zad.8
a) 2√14 = √2² * √14 = √4*14 = √56
c) 1/2√32 = √1/2² * √32 = √1/4*32 = √32/4 = √8
d) 0,4√125 = √0,4²*√125 = √0,16*125 = √20
e) 2/3√27 = √2/3²*√27 = √4/9*27 = √108/9 = √12

sorry ale nie widze co pisze dalej.