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Chapter 7 Solutions
Fundamentals of Differential Equations [With CDROM] - 7th Edition
- (1) Let R be a field of real numbers and X=R³, X is a vector space over R, let M={(a,b,c)/ a,b,cE R,a+b=3-c}, show that whether M is a hyperplane of X or not (not by definition). متکاری Xn-XKE 11Xn- Xmit (2) Show that every converge sequence in a normed space is Cauchy sequence but the converse need not to be true. EK 2x7 (3) Write the definition of continuous map between two normed spaces and write with prove the equivalent statement to definition. (4) Let be a subset of a normed space X over a field F, show that A is bounded set iff for any sequence in A and any sequence in F converge to zero the sequence converge to zero in F. އarrow_forwardEstablish the identity. 1 + cos u 1 - cos u 1 - cos u 1 + cos u = 4 cot u csc uarrow_forwardsin(cos Find the exact value of the expression sin cos -1 3 -15 + sin 5 13arrow_forward
- Solve the equation 2 cos 2x + √√3 = 0 for 0 ≤ 0 < 2π.arrow_forwardConsider y (t) — y" (t) − y' (t) + y(t) = 0 (a) Denote new variables x1(t) := y(t), x2(t) := y' (t), x3(t) = y"(t) and solve the following system 0 1 0 x1(t) X' (t) = 0 1 X(t), X(t) = x2(t) -1 1 1 x3(t) = y(t) y' (t) y" (t) (b) Use your solution to the system to find the solution to the original equation (verify!).arrow_forwardWrite tan (sec 1 1 ) 1-1-1) a as an algebraic expression.arrow_forward
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