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PARAMETRIC EQUATIONS POLAR AND COORDINATES
9,1 Parametric Gurves
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CONVERGENCE TESTS FOR INFINITE SERIES The geometric series in that case its sum is
n n=0 ar = a + a n n=0 ar = 1r .
ar + ar2 + ar3 + is convergent if  r < 1 and The geometric series is divergent if  r 1.
Test for Divergence If limn an do