The lengths of the sides of triangle ABC are (x+5) cm, (2x-1) cm and 16 cm. What is the possible range of values of x ?
A. 4<x<18
B. 4<x<22
C. 6<x<18
D. 6<x<22
數學 linear programming
2011-07-23 9:44 pm
回答 (1)
2011-07-23 9:51 pm
✔ 最佳答案
(x + 5) + (2x - 1) > 163x + 4 > 16
x > 4and (x + 5) + 16 > 2x - 1
21 > x - 1
x < 22and(2x - 1) + 16 > x + 5
x + 15 > 5
x > - 10i.e.4 < x < 22(B)
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