A.(1/2)pangkat 8+2x-x2>(1/2)pangkat x+2 ? B. 5log7=p , 5log8=q brapakah log 8? minta tolong setolong-tolongnya.. please kalau bisa pake cara yah
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(1/2)^(8+2x-x^2) > (1/2)^(x+2)
8 + 2x - x^2 < x+2
-x^2 + x + 6 < 0
x^2 - x - 6 > 0
(x -3)( x+2) > 0
x > 0 atau x< -2
.
B)
5'log 7 = p
5'log 8 = q
7'log 8 - 5'log 8 / 5'log 7 = q/p