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Pertanyaan

Prove that x 2 n + 1 + y 2 n + 1 is divisible by x + y ,where x + y  = 0 .

Prove that  is divisible by , where .

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A. Acfreelance

Master Teacher

Mahasiswa/Alumni UIN Walisongo Semarang

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terbukti untuk dibagi karena habis di bagi x+y

terbukti untuk straight x to the power of 2 straight n plus 1 end exponent plus straight y to the power of 2 straight n plus 1 end exponent dibagi straight x plus straight y karena table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses straight x plus straight y close parentheses open parentheses straight x squared minus xy plus straight y squared close parentheses open parentheses straight x to the power of 2 straight k end exponent plus straight y to the power of 2 straight k end exponent close parentheses end cell end table habis di bagi x+y

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Pembahasan

Untuk n = 1 maka Untuk n = k diasumsikan terbukti maka Untuk n = k+1 maka Jadi terbukti untuk dibagi karena habis di bagi x+y

Untuk n = 1 maka

table attributes columnalign right center left columnspacing 0px end attributes row cell straight x to the power of 2 straight n plus 1 end exponent plus straight y to the power of 2 straight n plus 1 end exponent end cell equals cell straight x to the power of 2.1 plus 1 end exponent plus straight y to the power of 2.1 plus 1 end exponent end cell row blank equals cell straight x cubed plus straight y cubed end cell row blank equals cell left parenthesis straight x plus straight y right parenthesis left parenthesis straight x squared minus xy plus straight y squared right parenthesis rightwards arrow terbukti end cell end table

Untuk n = k diasumsikan terbukti maka

table attributes columnalign right center left columnspacing 0px end attributes row cell straight x to the power of 2 straight n plus 1 end exponent plus straight y to the power of 2 straight n plus 1 end exponent end cell equals cell straight x to the power of 2. straight k plus 1 end exponent plus straight y to the power of 2. straight k plus 1 end exponent end cell row blank equals cell straight x to the power of 2 straight k plus 1 end exponent plus straight y to the power of 2 straight k plus 1 end exponent end cell row blank equals cell left parenthesis straight x plus straight y right parenthesis left parenthesis straight x to the power of 2 straight k end exponent plus straight y to the power of 2 straight k end exponent right parenthesis rightwards arrow terbukti end cell end table

Untuk n = k+1 maka

table attributes columnalign right center left columnspacing 0px end attributes row cell straight x to the power of 2 straight n plus 1 end exponent plus straight y to the power of 2 straight n plus 1 end exponent end cell equals cell straight x to the power of 2 left parenthesis straight k plus 1 right parenthesis plus 1 end exponent plus straight y to the power of 2 left parenthesis straight k plus 1 right parenthesis plus 1 end exponent end cell row blank equals cell straight x to the power of 2 straight k plus 3 end exponent plus straight y to the power of 2 straight k plus 3 end exponent end cell row blank equals cell left parenthesis straight x to the power of 2 straight k end exponent. straight x cubed right parenthesis plus left parenthesis straight y to the power of 2 straight k end exponent. straight y cubed right parenthesis end cell row blank equals cell open parentheses straight x cubed plus straight y cubed close parentheses open parentheses straight x to the power of 2 straight k end exponent plus straight y to the power of 2 straight k end exponent close parentheses end cell row blank equals cell open parentheses straight x plus straight y close parentheses open parentheses straight x squared minus xy plus straight y squared close parentheses open parentheses straight x to the power of 2 straight k end exponent plus straight y to the power of 2 straight k end exponent close parentheses rightwards arrow terbukti end cell end table

Jadi terbukti untuk straight x to the power of 2 straight n plus 1 end exponent plus straight y to the power of 2 straight n plus 1 end exponent dibagi straight x plus straight y karena table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell open parentheses straight x plus straight y close parentheses open parentheses straight x squared minus xy plus straight y squared close parentheses open parentheses straight x to the power of 2 straight k end exponent plus straight y to the power of 2 straight k end exponent close parentheses end cell end table habis di bagi x+y

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