Selesaikan setiap persamaan eksponensial berikut:

c). $4^{x+1}$ + $2^{2x}$ = 20
d). $2^{x}$ – $2^{x+2}$ = -12

Selesaikan setiap persamaan eksponensial berikut:

Jawaban Terkonfirmasi

$$begin{align} 4^{x+1}+2^{2x}&=20\2^{2x+2}+2^{2x}^&=2^2times5\2^{2x}(2^2+2^0)&=2^2times5\2^{2x}(4+1)&=2^2times5\2^{2x}timesnot5&=2^2timesnot5\2^{2x}&=2^2\2x&=2\x&=boxed1 end$
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$$begin{align} 2^x-2^{x+2}&=-12\2^x(2^0-2^2)&=2^2times-3\2^x(1-4)&=2^2times-3\2^xtimesnot-3&=2^2timesnot-3\x&=boxed2 end$