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e. 9 3. Himpunan penyelesaian persamaan 2log x2 = 1 + 2log (x + 4) adalah .... a {4} b. {-2} {2,4} d. {-2,4} C. P 1-4 21
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Putra Gema Nusa
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2 X = 2 Х 2 2 log x2 = 1 + 'log (x+4) *log x* = -log 2 + long (x+4) Hag x² = lang 2(x+1) x? x?- 2x -8 (x - 2)(x+2) = 0 Х 2 - 2x + 8 2X + 8 :{-2,4} (d.) ) s >X-4=0 -> X+2=0 Đ x=9 x = -2 Pahamify
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