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Notes On Finding The Solution Of Given Question

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Published in: Mathematics
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How to find the sum of geometric series

Mohammad T / Lucknow

13 years of teaching experience

Qualification: B.Sc (Dr Ram Manohar Lohia Avadh University , Faizabad - 1995)

Teaches: All Subjects, EVS, Mathematics, Science, Algebra, Physics

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  1. Question 1 - fFnd the first term and sum of the 10 terms of GP having difference of second and first term is 6 and difference of third and second term 'is 12.
  2. Solution 1 Let us consider the three terms of GP as —a —a since a a(r and a ar(r =ar a =ar —6 6 a= —6 —ar=1'2 2 (1) (1) 12 (2) dividing eq 2 by 1 ar r—l) 12 ——6 a(r—l)
  3. by eql we get —6 —6 —6 —3 a(rn- by using S = (r—l) s 10 — S 10 — —3 '2 x 1023 10 — —3