Ответ: logₐb=1,5.
Пошаговое объяснение:
log₄a=log₈b logₐb=?
(1/2)*log₂a=(1/3)*log₂b |×6
3*log₂a=2*log₂b
3*(logₐa/logₐ2)=2*(logₐb/logₐ2)
3*1/logₐ2=2*logₐb/logₐ2 |×logₐ2
2*logₐb=3 |÷2
logₐb=3/2=1,5.
15 3/28 - (4 11/28+у) = 5 19/284 11/28 + у = 15 3/28 - 5 19/28 = 10 + (3/28 - 19/28) = 9 + (28/28 + 3/28 - 19/28) = 9 + 12/28 = 9 12/28у = 9 12/28 - 4 11/28 = 5 1/28
1) 720 : 8 = 90 2) 80 - 7 = 73
90 * 8 = 720 73 + 7 = 80
720 : 90 = 8 80 - 73 = 7
8 * 90 = 720 7 + 73 = 80