Tolong bantu ya 2 soal mtk 3 dan 4.... Question from @Nutriani

November 2018 2 42 Report

Tolong bantu ya 2 soal mtk 3 dan 4

rima29 3. 2x-3+4+2x = 0
4x + 1 = 0
4x = -1
x = -1/4

1/x = 1 : -1/4 = 1 x -4 = -4

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whongaliem $2^{2x - 3}$ . $4^{2 + x}$ = 1
$2^{2x - 3}$ . $(2^{2}) ^{2 + x}$ = $2^{0}$
$2^{2x + 3}$ . $2^{4 + 2x}$ = $2^{0}$
$2^{2x - 3 + 4 + 2x}$ = $2^{0}$
$2^{4x + 1}$ = $2^{0}$
4x + 1 = 0
4x = - 1
x = - 1/4
1/x = - 4
4) $25^{ x^{2} - 3x - 4}$ < $5^{ x^{2} + 8x + 3}$
$(5^{2}) ^{ x^{2} - 3x - 4}$ < $5^{ x^{2} + 8x - 3}$
$5^{2 x^{2} - 6x - 8}$ < $5 ^{ x^{2} + 8x - 3}$
2x² - 6x - 8 < x² + 8x - 3
2x² - x² - 6x - 8x - 8 + 3 < 0
x² - 14x - 5 < 0
tidak ada opsi yang memenuhi ...

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