translating and solving an equation with values of x and y known

조회 수: 1 (최근 30일)
Griffin Murphy
Griffin Murphy 2021년 9월 21일
댓글: Star Strider 2021년 9월 21일
m = 2*x.^3-2*y-sqrt((x-y.^3)./(1+(x-y)./(x.^2+3))+((sin(x./y*pi))+exp(y/3)))
with x=3.53 and y=2.8
i get an answer of 82.3740 - 3.9723i

답변 (1개)

Star Strider
Star Strider 2021년 9월 21일
In the third term, the square root is of the numerator only, not the entire expression, amd the denominator does not appear to have been coded correctly.
x=3.53
x = 3.5300
y=2.8
y = 2.8000
m = 2*x.^3-2*y-sqrt(x-y.^3)./(1+((x-y)./(x.^2+3)))+sin(x./y*pi)+exp(y/3)
m = 84.1864 - 4.0986i
These changes only slightly change the result.
.
  댓글 수: 3
Griffin Murphy
Griffin Murphy 2021년 9월 21일
the professor said during class that someone got the answer right and i checked with that student to see if my answer was correct and he said no (to the one you gave me)
when I do the equation out regularly i get 83.5908318
Star Strider
Star Strider 2021년 9월 21일
That change is significant (note the added parentheses in the square root argument).
x=3.53
x = 3.5300
y=2.8
y = 2.8000
m = 2*x.^3-2*y-sqrt((x-y).^3)./(1+((x-y)./(x.^2+3)))+sin(x./y*pi)+exp(y/3)
m = 83.5908
.

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