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Hitunglah jumlah sampai tak hingga. a. 3 + 1 + 3 1 ​ + 9 1 ​ + ... b. 16 − 8 + 4 − 2 + ... c. 7 + 7 ​ + 1 + .... d. 2 − 2 ​ + 1 − 2 1 ​ 2 ​

Hitunglah jumlah sampai tak hingga.

a. 
b. 
c. 
d. 

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Untuk menghitung jumlah sampai tak hingga dengan menggunakan rumus jumlah dari deret geometri tak hingga yaitu : a. Diketahui a = 3 dan r = Maka, b. Diketahui a = 16dan r = Maka, c. Diketahui a = 7dan r = Maka, d. Diketahui a = 2dan r = Maka,

Untuk menghitung jumlah sampai tak hingga dengan menggunakan rumus jumlah dari deret geometri tak hingga yaitu :

Error converting from MathML to accessible text.

a. 3 plus 1 plus bevelled 1 third plus bevelled 1 over 9 plus...

Diketahui a = 3 dan r = bevelled 1 third
Maka,

table attributes columnalign right center left columnspacing 0px end attributes row cell straight S subscript infinity end cell equals cell fraction numerator straight a over denominator 1 minus straight r end fraction end cell row blank equals cell fraction numerator 3 over denominator 1 minus begin display style bevelled 1 third end style end fraction end cell row blank equals cell fraction numerator 3 over denominator begin display style bevelled 2 over 3 end style end fraction end cell row blank equals cell bevelled 9 over 2 end cell end table

b. 16 minus 8 plus 4 minus 2 plus...

Diketahui a = 16 dan r = negative bevelled 1 half
Maka,

table attributes columnalign right center left columnspacing 0px end attributes row cell straight S subscript infinity end cell equals cell fraction numerator straight a over denominator 1 minus straight r end fraction end cell row blank equals cell fraction numerator 16 over denominator 1 minus begin display style open parentheses negative bevelled 1 half close parentheses end style end fraction end cell row blank equals cell fraction numerator 16 over denominator begin display style bevelled 3 over 2 end style end fraction end cell row blank equals cell bevelled 32 over 3 end cell end table

c. 7 plus square root of 7 plus 1 plus....

Diketahui a = 7 dan r = bevelled fraction numerator 1 over denominator square root of 7 end fraction
Maka,

table attributes columnalign right center left columnspacing 0px end attributes row cell straight S subscript infinity end cell equals cell fraction numerator straight a over denominator 1 minus straight r end fraction end cell row blank equals cell fraction numerator 7 over denominator 1 minus begin display style open parentheses bevelled fraction numerator 1 over denominator square root of 7 end fraction close parentheses end style end fraction end cell row blank equals cell fraction numerator 7 over denominator begin display style 1 minus bevelled fraction numerator square root of 7 over denominator 7 end fraction end style end fraction end cell row blank equals cell fraction numerator 49 over denominator 7 minus square root of 7 end fraction end cell row blank equals cell fraction numerator 7 left parenthesis 7 plus square root of 7 right parenthesis over denominator 6 end fraction end cell row blank equals cell fraction numerator 49 plus 7 square root of 7 over denominator 6 end fraction end cell row blank equals cell 11 comma 25 end cell end table

d. 2 minus square root of 2 plus 1 minus bevelled 1 half square root of 2

Diketahui a = 2 dan r = negative bevelled fraction numerator 1 over denominator square root of 2 end fraction
Maka,

table attributes columnalign right center left columnspacing 0px end attributes row cell straight S subscript infinity end cell equals cell fraction numerator straight a over denominator 1 minus straight r end fraction end cell row blank equals cell fraction numerator 2 over denominator 1 minus begin display style open parentheses negative bevelled fraction numerator 1 over denominator square root of 2 end fraction close parentheses end style end fraction end cell row blank equals cell fraction numerator 2 over denominator begin display style 1 plus bevelled fraction numerator square root of 2 over denominator 2 end fraction end style end fraction end cell row blank equals cell fraction numerator 2 over denominator begin display style fraction numerator 2 plus square root of 2 over denominator 2 end fraction end style end fraction end cell row blank equals cell fraction numerator 4 over denominator 2 plus square root of 2 end fraction end cell row blank equals cell 4 minus 2 square root of 2 end cell row blank equals cell 1 comma 17 end cell end table

 

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