Question

1+r+r²+r³+...=3/4, r = ?

Answer 1

Answer:

tip :it's in GP (geometric progression)............

so apply gp formula....

Answer 2

1+r+r²+r³+...=3/4
r(r+r² r³+...)=3/4-1
r=-1/4 x 1/(r+r² r³+...)
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