a. The seventh term of an arithmetic progression is 19 and the sum of the first twelve
Question:
a. The seventh term of an arithmetic progression is 19 and the sum of the first twelve terms is 224.
Find the fourth term.
b. A geometric progression has first term 3 and common ratio r. A second geometric progression has first term 2 and common ratio 1/5r. The two progressions have the same sum to infinity, S. Find the value of r and the value of S.
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a Let the first term of the arithmetic progression be a and the common difference be d Then the seve...View the full answer
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Related Book For
Cambridge International AS And A Level Mathematics Pure Mathematics 1 Coursebook
ISBN: 9781108407144
1st Edition
Authors: Sue Pemberton, Julian Gilbey
Question Posted:
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