find the three geometric means between 42 and 672
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find the three geometric means between 42 and 672
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Answer:
84, 168, and 336
Step-by-step explanation:
an = a1 • r^n-1
a5 = 42 • r^5-1
672 = 42r^4
672/42 = 42r^4/42
16 = r^4
4√16 = 4√r^4
2 = r
42 • 2 = 84
84 •2 = 168
168 • 2 = 336
336 • 2 = 672