Hello,
I am trying to solve the following equation with regard to r.
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4200=(300*(1/(r+1)^7-1))/(1/(r+1)-1)+4500/(r+1)^7
solve(%,r);
[0=13*r^7+90*r^6+266*r^5+434*r^4+420*r^3+238*r^2+70*r-8]
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What am I missing in order to get the value of r??
J.