.a7 = 21, n = 7, d = 4, a1 = ?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter9: Real Numbers And Right Triangles
Section9.1: Square Roots
Problem 2E
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1.a7 = 21, n = 7, d = 4, a1 = ?
2.a1 = 1/3, a5 = 27, n=5, r = ?
3. There exist a whole number where it’s square root is equal to 10.

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