Finansies: SREL-Bepaal i#1

R9644 vermeerder tot R20638.16 nadat dit vir 'n 12 jaar teen 'n sekere saamgestelde rentekoers belê is.
Bepaal die rentekoers tot 1 desimale plek.

$A equals 20638.16 P equals 9644 n equals 12 i equals ?$

$table attributes columnalign right center left columnspacing 0px end attributes row A equals cell P open parentheses 1 plus i close parentheses to the power of n end cell row cell 20638.16 end cell equals cell 9644 open parentheses 1 plus i close parentheses to the power of 12 end cell row cell fraction numerator 20638.16 over denominator 9644 end fraction end cell equals cell open parentheses 1 plus i close parentheses to the power of 12 end cell row cell 2.14 end cell equals cell open parentheses 1 plus i close parentheses to the power of 12 end cell row cell root index 12 of 2.14 end root end cell equals cell 1 plus i end cell row cell 1.065 end cell equals cell 1 plus i end cell row cell 1.065 minus 1 end cell equals i row i equals cell 0.065 end cell row r equals cell 100 i end cell row blank equals cell 100 open parentheses 0.065 close parentheses end cell row blank equals cell 6.5 percent sign end cell end table$