tailieunhanh - Engineering Mathematics 4 Episode 8

Tham khảo tài liệu 'engineering mathematics 4 episode 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | FUNCTIONS AND THEIR CURVES 269 Figure scale factor a . Graphs of y D x C 1 and y D 3 x C 1 are shown in Fig. a and graphs of y D sin 0 and y D 2 sin 0 are shown in Fig. b . Figure iii ii y f .x Y a The graph of y D f x is translated by a units parallel to the y-axis to obtain y D f x C a. For example if fix D x y D f x C 3 becomes y D x C 3 as shown in Fig. a . Similarly if f 0 D cos 0 then y D f 0 C 2 becomes y D cos 0 C 2 as shown in Fig. b . Also if f x D x2 then y D f x C 3 becomes y D x2 C 3 as shown in Fig. c . Figure y D f x is translated by a y f .x Y a 0 The graph of units parallel to the x-axis to obtain y D f x C a . If a 0 it moves y D f x in the negative direction on the x-axis . to the left and if a 0 it moves y D f x in the positive direction on the x-axis . to the right . For example if f x D sinx z. n y f x becomes y sin x as 3 3 4 shown in Fig. a and y D sin x C is shown in Fig. b . 270 ENGINEERING MATHEMATICS Figure Figure Similarly graphs of y x2 y x 1 2 and y x C 2 2 are shown in Fig. . iv y f ax For each point x1 y1 on the graph of y f x there exists a point yộ on the graph of y f ax . Thus the graph of y f ax can be obtained by stretching y f x parallel to the x-axis by a scale factor -. c For example if f x x 1 2 and a then f ax x - 1 . Both of these curves are shown in Fig. a . Similarly y cos x and y cos 2x are shown in Fig. b . b Figure Figure v y f x The graph of y f x is obtained by reflecting y f x in the x-axis. For example graphs of y ex and y ex are shown in Fig. a and graphs of y x2 C 2 and y - x2 C 2 are shown in Fig. b . vi y f x The graph of y f x is obtained by reflecting y f x in the y-axis. For example graphs of y x3 and y x 3 x3 are shown in Fig. a and graphs FUNCTIONS AND THEIR CURVES 271 the form y f x a. Since a 8 then y x3 8 is translated 8 units down from y x3 parallel to the y-axis. See section .

crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.