Which of the following is a counterexample of x/x=1 for all number x? x = (1/2)/(1/2) x = (-2)/(-2) x = 0 x = 1 Which of the following is a TRUE mathematical sentence? x – 1 = 0 x • 0 = x x + 0 = x x = 1 Which of the following is the truth value of f(x) = 2x+ 3 ? always true sometimes true always false sometimes true/sometimes false Which of the following is the mathematical sentence of “twice a number decreased by twenty-nine is seven? 29 - 2x = 7 2x -7 -29 2x - 29 = 7 29 - 7 = 2x Which mathematical sentence represents “twelve is eight less than four times a number”? 4x + 8 =12 12 = - 8 - 4x 4x – 8 =12 8 = 4x +12
Which of the following is a counterexample of x/x=1 for all number x? x = (1/2)/(1/2) x = (-2)/(-2) x = 0 x = 1 Which of the following is a TRUE mathematical sentence? x – 1 = 0 x • 0 = x x + 0 = x x = 1 Which of the following is the truth value of f(x) = 2x+ 3 ? always true sometimes true always false sometimes true/sometimes false Which of the following is the mathematical sentence of “twice a number decreased by twenty-nine is seven? 29 - 2x = 7 2x -7 -29 2x - 29 = 7 29 - 7 = 2x Which mathematical sentence represents “twelve is eight less than four times a number”? 4x + 8 =12 12 = - 8 - 4x 4x – 8 =12 8 = 4x +12
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Which of the following is a counterexample of x/x=1 for all number x?
x = (1/2)/(1/2)
x = (-2)/(-2)
x = 0
x = 1
Which of the following is a TRUE mathematical sentence?
x – 1 = 0
x • 0 = x
x + 0 = x
x = 1
Which of the following is the truth value of f(x) = 2x+ 3 ?
always true
sometimes true
always false
sometimes true/sometimes false
Which of the following is the mathematical sentence of “twice a number decreased by twenty-nine is seven?
29 - 2x = 7
2x -7 -29
2x - 29 = 7
29 - 7 = 2x
Which mathematical sentence represents “twelve is eight less than four times a number”?
4x + 8 =12
12 = - 8 - 4x
4x – 8 =12
8 = 4x +12
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