jillianbarnes1816 jillianbarnes1816

23-01-2024
Mathematics

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Three numbers are in an increasing geometric progression with common ratio r. If the middle number is doubled, then the new numbers are in an arithmetic progression with common difference d. If the fourth term of GP is 3r², then r²−d is equal to

a. 7 – 7 √3
b. 7 + 7 √3
c. 7 - √3
d. 7 + 3 √3

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