bmelyk
Just wanna see if my answer is correct!



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bmelyk
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Consider the function defined below.
\[y=x ^{\frac{ 15 }{ 8 }}\]

bmelyk
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\[y''=\frac{ 345 }{ 64 }x ^{\frac{ 31 }{ 8 }}\]

bmelyk
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\[y'''=\frac{ 10695 }{ 520 }x ^{\frac{ 42 }{ 8 }}\]

bmelyk
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just wanna know if i have my y'' and y''' right or not.

hartnn
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2nd is correct

bmelyk
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what should the third one be?

hartnn
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nopes.

bmelyk
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huh?

hartnn
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i get 512 instead of 520 and 39 instead of 42

bmelyk
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i keep getting the same answer?

bmelyk
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yah i just redid it and had that too .. i had my exponent messed up which messed up my answer.

hartnn
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31/81 = (318)/8 = ?

bmelyk
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its 39, i just had it done done out wrong. well neg 39

hartnn
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now u got the correct answer ?

hartnn
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like did u get 512 ?

hartnn
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no ?