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disa [49]
3 years ago
14

Please can I get an explanation, please!!

Mathematics
1 answer:
nekit [7.7K]3 years ago
7 0

Find the inverse of

y = \left( \dfrac 1 5 \right)^x

For the inverse we swap x and y and solve for y.

x = \left( \dfrac 1 5 \right)^y

Taking logs base 1/5

\log_{1/5} x = y

f^{-1}(x) = \log_{1/5} x

Answer: Second Choice

Note: There's more simplification to do but we'll stop here.

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Irina-Kira [14]
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42 + 6 = 48 cm. But wait! You have to take one more step, which is minus-ing 6 from 48. Why? Notice that there is a little area where a side of the small square meets the bigger square. That little area is worth 3 cm ( length is 3, height is 1 cm ) times 2 ( 3 cm is one side, another 3 cm is the other side from the other square ) = 6 cm.

Your total answer should be 42. ( or 48, if your teacher doesn't count the area where the squares meet/join together ).

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sergiy2304 [10]
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