determinați termenul necunoscut x ,știind că
a) (7↑x)=7↑81
b) 10↑13=50↑14:x↑13
c) (20:x)↑30=4↑30
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Răspuns:
a)
(7•x)=7•81
7•x=567
x=567:7
x=81
b)
10•13=50•14:x•13
130=700:x•13
700:x•13=130
700:x=130:13
700:x=10
x=700:10
x=70
c)
(20:x)•30=40•30
(20:x)•30=1200
20:x=1200
x:20=1200
x=1200•20
x=24.000