Find the sum of the following series :
(i) 1 + (1 + a)r + (1 + a + a2)r2 + ...... to n terms
.
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Find the sum of the following series :
(i) 1 + (1 + a)r + (1 + a + a2)r2 + ...... to n terms
.
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Answer:
a+(n-1)d.......................
Answer:
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