Can I get help with loops and char function?

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Amy Joyce Valencia
Amy Joyce Valencia 2021-10-23
评论： Chunru 2021-10-23
Write a script that accepts as input a number n greater than or equal to 1 and less than 8, and then uses this number to calculate the 1st, 2nd, 3rd, ..., nth derivative of the polynomial below. The output should be formatted as below (in this example, the user gave an input of 5). Hint: Use the char() function to convert any symbolic variable, expression or equation into a string.
2𝑥^9 +3𝑥^6 −8𝑥^2
n = input('Enter # of derivatives to compute (1-7): '); %prompts a value input
syms x
E = 2*x^9 + 3*x^6 - 8*x^2
diff(E, n)
This is what I have so far. I have no idea how to use the char function

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回答（1 个）

Chunru
Chunru 2021-10-23
编辑：Chunru 2021-10-23
Ran in:
n = 3; %input('Enter # of derivatives to compute (1-7): '); %prompts a value input
syms x
E = 2*x^9 + 3*x^6 - 8*x^2
E = 
for i=1:n
a = diff(E, i)
c =char(a);
disp(c)
end
a = 
18*x^5 - 16*x + 18*x^8
a = 
90*x^4 + 144*x^7 - 16
a = 
360*x^3 + 1008*x^6
  2 个评论
Amy Joyce Valencia
Amy Joyce Valencia 2021-10-23
How would I show all the prior derivatives? For example, if n=3 how would I show the first and second derivative as well

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