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Buktikan masing-masing ketidaksamaan eksponen di bawah ini. b. n ≤ 2 n − 1

Buktikan masing-masing ketidaksamaan eksponen di bawah ini.

b.  

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A. Acfreelance

Master Teacher

Mahasiswa/Alumni UIN Walisongo Semarang

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Pembahasan

Pembuktian dengan menggunkan induksi matematika dimana n = 1 maka Untuk n = k diasumsikan terbukti maka akan dibuktikan n = k+1 maka Jadi terbukti bahwa karena hasil sisi kanan dan kiri sama

Pembuktian dengan menggunkan induksi matematika dimana

n = 1 maka

table attributes columnalign right center left columnspacing 0px end attributes row straight n less or equal than cell 2 to the power of straight n minus 1 end exponent end cell row 1 less or equal than cell 2 to the power of 1 minus 1 end exponent end cell row 1 less or equal than cell 2 to the power of 0 end cell row 1 less or equal than cell 1 rightwards arrow Terbukti end cell end table

Untuk n = k diasumsikan terbukti maka

table attributes columnalign right center left columnspacing 0px end attributes row straight n less or equal than cell 2 to the power of straight n minus 1 end exponent end cell row straight k less or equal than cell 2 to the power of straight k minus 1 end exponent rightwards arrow Terbukti end cell end table

akan dibuktikan n = k+1 maka

table attributes columnalign right center left columnspacing 0px end attributes row straight n less or equal than cell 2 to the power of straight n minus 1 end exponent end cell row cell straight k plus 1 end cell less or equal than cell 2 to the power of straight k minus 1 end exponent plus 1 end cell row cell 2 to the power of straight k minus 1 end exponent plus straight k plus 1 end cell less or equal than cell 2 to the power of straight k minus 1 plus 1 end exponent end cell row cell 2 to the power of straight k minus 1 end exponent plus 2 to the power of straight k.2 to the power of 1 end cell less or equal than cell 2 to the power of straight k end cell row cell 2 to the power of straight k minus 1 end exponent plus 2 to the power of straight k plus 1 end exponent end cell less or equal than cell 2 to the power of straight k rightwards arrow terbukti end cell end table

Jadi terbukti bahwa straight n less or equal than 2 to the power of straight n minus 1 end exponent karena hasil sisi kanan dan kiri sama

 

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