题目

ENG1005 - MUM S2 2025 Practice Exam

多项填空题

Question texta) The Maclaurin series of [math: ex2]e^{x^2} is [math: ex2=]e^{x^2} =Answer 1 Question 9[input] [math: +] Answer 2 Question 9[input][math: x] [math: +] Answer 3 Question 9[input][math: x2]x^2 [math: +] Answer 4 Question 9[input][math: x3]x^3 [math: +…]+\ldotsb) The Maclaurin series of [math: ∫0x6ln⁡(1+t)sin⁡(t)dt]\int_0^x 6\ln(1+t)\sin(t) dt is [math: ∫0x6ln⁡(1+t)sin⁡(t)dt=]\int_0^x 6\ln(1+t)\sin(t) dt =Answer 5 Question 9[input] [math: +] Answer 6 Question 9[input][math: x] [math: +] Answer 7 Question 9[input][math: x2]x^2 [math: +] Answer 8 Question 9[input][math: x3]x^3 [math: +…]+\ldots

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The task contains two separate parts (a and b) with multiple blanks to fill in the Maclaurin (Taylor at 0) series coefficients. Part a) The Maclaurin series of e^{x^2} is asked. To analyze the options: - The function e^{x^2} is the exponential of x^2. Its Taylor expansion around x=0 only contains even powers of x, since e^{t} = 1 + t + t^2/2! + t^3/3! + ... and substituting t = x^2 yields terms x^{2k} for k=0,1,2,... . Therefore, the coefficient of x^1 (the x-term) must be 0, because there is no x^1 term in the series. This means the place where you would write the coefficient for x^1 should reflect a value of 0. - The constant term (x^0) is e^{0} = 1, so the coefficient of x^0 is 1. - The x^2 term comes from the k=1 term: (x^2)/1!, g......Login to view full explanation

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Question text 9Marks a) The Maclaurin series of [math: f(x)=2cos⁡(x)]f(x) = 2\cos(x) is [math: f(x)=]Answer 1[input][math: +]Answer 2[input][math: x+]Answer 3[input][math: x2+⋯]x^2+\cdotsb) The Maclaurin series of [math: g(x)=6ln⁡(1−x)]g(x) = 6\ln(1-x) is [math: g(x)=]Answer 4[input][math: +]Answer 5[input][math: x+]Answer 6[input][math: x2+⋯]x^2+\cdotsc) The Maclaurin series of [math: h(x)=2cos⁡(3x)+6ln⁡(1−x2)]h(x) = 2\cos(3x) + 6\ln(1-x^2) is[math: h(x)=]Answer 7[input][math: +]Answer 8[input][math: x+]Answer 9[input][math: x2+⋯]x^2+\cdotsPlease answer all parts of the question.Notes Report question issue Question 7 Notes

Question text 9Marks a) The Maclaurin series of [math: f(x)=2cos⁡(x)]f(x) = 2\cos(x) is [math: f(x)=]Answer 1[input][math: +]Answer 2[input][math: x+]Answer 3[input][math: x2+⋯]x^2+\cdotsb) The Maclaurin series of [math: g(x)=6ln⁡(1−x)]g(x) = 6\ln(1-x) is [math: g(x)=]Answer 4[input][math: +]Answer 5[input][math: x+]Answer 6[input][math: x2+⋯]x^2+\cdotsc) The Maclaurin series of [math: h(x)=2cos⁡(3x)+6ln⁡(1−x2)]h(x) = 2\cos(3x) + 6\ln(1-x^2) is[math: h(x)=]Answer 7[input][math: +]Answer 8[input][math: x+]Answer 9[input][math: x2+⋯]x^2+\cdotsNotes Report question issue Question 7 Notes