P=1/2q, q=2r, pqr=54, maka nilai p-q+r adalah
Jawab:
p – q + r = 0
Penjelasan dengan langkah-langkah:
p = 1/2 q
q = 2r
pqr = 54
(1/2q).(2r).r = 54
( .2r).(2r).r = 54
(r).(2r).(r) = 54
2r³ = 54
r³ = 54 : 2 = 27
r = = 3
p – q + r = r – 2r + r
= 2r – 2r = (2-2)r = (0)r = (0).3 = 0