Solve.A complex number z does not belong to the Mandelbrot set if any of the complex numbers in the sequence z, 
(z2 + z)2 + z, [(z2 + z)2 + z]2 + z, ... has modulus exceeding 2. Does 
belong to the Mandelbrot set?
A. Yes
B. No
Answer: B
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Determine the total turn for the closed curve. Assign a positive measure to counterclockwise turning.
A. 720° B. -360° C. 0° D. 360°
A tamoxifen study claims that a combination of chemotherapy and the hormone therapy tamoxifen is more effective than tamoxifen alone in preventing breast cancer. In the study, a group of researchers from the U.S. and Canada studied 1477 postmenopausal women with early-stage breast cancer. The women were randomly assigned to one of three study groups. Group A (361 patients) received tamoxifen alone on a daily basis for five years. Group B (566 patients) received chemotherapy and tamoxifen for six months, and then completed five years of tamoxifen treatment. Group C (550 patients) received chemotherapy alone for six months followed by five years of tamoxifen treatment. All 1477 patients knew which treatment they were receiving.This study is
A. not an experiment. B. double-blind. C. blind, but not double-blind. D. not blind. E. none of these
Fill in the blank using the word product, sum, quotient, or difference.The formula sin ? sin ? = 
[cos (? - ?) - cos (? + ?)] can be used to change a 
of two sines into the 
of two cosine expressions.
A. product, sum B. quotient, sum C. product, difference D. quotient, difference
Find the y-intercepts and any x-intercepts.y = 2x2 - 4x
A. y-intercept (0, 0), x-intercepts (0, 0) and (0, 2) B. y-intercept (0, 0), x-intercept (2, 0) C. y-intercept (0, 0), x-intercepts (0, 0) and (-2, 0) D. y-intercept (0, 0), x-intercepts (0, 0) and (2, 0)