
Amicable Numbers The Greeks considered the pair of numbers 220 and 284 to be amicable or friendly numbers because the sum of the proper divisors of one of the numbers is the other number.
The sum of the proper factors of 220 is
The sum of the proper factors of 284 is
Determine whether
- 60 and 84 are amicable numbers.
- 1184 and 1210 are amicable numbers.

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Chapter 6 Solutions
Mathematical Excursions (Looseleaf)
- Question 8 Find the domain of y = log(62x). The domain is: Question 9arrow_forwardQuestion 3 Rewrite 4 = log₂(16) in exponential form. Question 4 症 If log, (6x+3)= 4, then rarrow_forwardQuestion 6 Find the solution of the exponential equation 2t 100(1.07) 2 = 500,000 in terms of logarithms, or correct to four decimal places. t=arrow_forward
- Question 6 Find the solution of the exponential equation 100(1.07)² = 500, 000 in terms of logarithms, or correct to four decimal places. t = Question 7 Solve the equation.arrow_forwardI need help on 10arrow_forward|x6|= 5 The distance between x and is spaces on the number line, in either direction. Next Partarrow_forward
- 6 pts 1 Details 3 Find a formula for the exponential function passing through the points -3, and (3,375) 125 f(x) = Question 3arrow_forward18. Let X be normally distributed with mean μ = 2,500 and stan- dard deviation σ = 800. a. Find x such that P(X ≤ x) = 0.9382. b. Find x such that P(X>x) = 0.025. ة نفـة C. Find x such that P(2500arrow_forward17. Let X be normally distributed with mean μ = 2.5 and standard deviation σ = 2. a. Find P(X> 7.6). b. Find P(7.4≤x≤ 10.6). 21 C. Find x such that P(X>x) = 0.025. d. Find x such that P(X ≤x≤2.5)= 0.4943. and stan-arrow_forward(1) Let M and N be non-empty subsets of a linear space X, show that whether = U or not, and show that there whether exsits a liear function from P₂(x) into R' which onto but not one-to-one or not. ام (2) Let R be a field of real numbers and P,(x)=(a+bx+cx? / a,b,ce R} be a vector space over R, show that whether there exsit two hyperspaces A and B such that AUB is a hyperspace or not. (3) Let A be an affine set in a linear space X over afield F and tEA, show that A-t is a subspace of Xand show that if M and N are balanced sets then M+N is balanced set. (4) Write the definition of bounded set in a normed space, and write with prove an equivalent statement to definition. (5) Let d be a metric on a linear space X over a field F, write conditions on d in order to get that there is a norm on X induced dy d and prove that. (6) Let M be a non-empty subset of a normed space X, show that xEcl(M) iff for any r>o there exsits yEM such that llx-yllarrow_forwardLet V be the volume of the solid obtained by rotating about the y-axis the region bounded y = √16x and y V = Draw a diagram to explain your method. 15 10 5 y 15 10 5 y = Find V by slicing. 16 X О -15 -10 -5 5 10 15 О -15 -10 -5 5 10 15 15 10 y 15 10 5 y x -15 -10 -5 5 10 -15 -10 -5 5 10 15 10 X 15arrow_forwarda) let SSK : A->R be function and let c be acluster Point of A if lim S, (x) exists for each i=1, 2, .-,k then K i) lim Si (x)= lim fi (x) X->C 1=1 11), im π fi (x) = lim fi (x) YC il i=1 1) let f(x) = ) x² Sin (1/x), xe Q/{o} f(x) = { x² cos(\/x), x&Q Show that lim f(x)= 0 X = 0 c) Give an example of aset ASR, a cluster Point C of Aand two fun. & 9: AR st lim f(x)9(x) exsis bat limfex) does not exist X-Carrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_iosRecommended textbooks for you
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