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jj1077348
21.02.2020 •
Mathematics
What is the remainder when f(x) = x3 + 3x2 + 6x + 9 is divided by x + 2? A. −7 B. 1 C. 17 D. 41
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Ответ:
B.1
Step-by-step explanation:
when f(x) is divided by (x+2).
The remainder,
f(-2) = -8 + 12 - 12 + 9
f(-2) = 1
The remainder is 1.
Ответ:
Arc AD = 43°
Step-by-step explanation:
Image is attached.
When an angle subtends from an Arc to the center, the measure of the Arc and the Angle are same. Now, looking at the figure,
Arc AB = 180 (since this is an Arc subtending the diameter)
Arc DC = 90 degrees since the central angle is 90
So,
Arc AD + Arc CB = 180 - 90 = 90
Arc AD and Arc CB have the same measures as the central angle it created (terms in x). So we can write:
Arc AD + Arc CB = 90
7x + 1 + 9x - 7 = 90
We can solve for x:
The central angle AD is:
AD = 7x + 1 = 7(6) + 1 = 43
Also, Arc AD is same, thus:
Arc AD = 43°