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mash [69]
3 years ago
8

Line CD is the perpendicular bisector of segment AB. The lines intersect

Mathematics
1 answer:
svetoff [14.1K]3 years ago
8 0

Answer:

E is the same distance from A and B. ⇒ D

Step-by-step explanation:

<em>Let us explain the meaning of perpendicular bisector</em>

If line m is the perpendicular bisector of line n, then

  • line m intersect line n at the mid-point of line n
  • They form 4 right angles around this mid-point

∵ Line CD is the perpendicular bisector of segment AB

∴ Line CD intersects segment AB at the mid-point of AB

∵ Line CD and segment AB intersected at point E

→ That means E ∈ CD and E ∈ AB

∴ Point E is the mid-point of line AB

∴ Point E divides line AB into 2 equal parts

→ That means point E is at the same distance from points A and B

∴ E is the same distance from A and B.

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Mohamed and Li Jing were asked to find an explicit formula for the sequence -5, -25, -125, -625,....
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Answer:

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Step-by-step explanation:

Considering the sequence

-5,\:-25,\:-125,\:-625,...

A geometric sequence has a constant ratio r and is defined by

g_n=g_0\cdot r^{n-1}

\mathrm{Compute\:the\:ratios\:of\:all\:the\:adjacent\:terms}:\quad \:r=\frac{g_{n+1}}{g_n}

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\mathrm{The\:ratio\:of\:all\:the\:adjacent\:terms\:is\:the\:same\:and\:equal\:to}

r=5

So, the sequence is geometric.

as

\mathrm{The\:first\:element\:of\:the\:sequence\:is}

g_1=-5

r=5

so

g_n=g_1\cdot r^{n-1}

\mathrm{Therefore,\:the\:}n\mathrm{th\:term\:is\:computed\:by}\:

g_n=-5\cdot \:5^{n-1}

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3 years ago
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Answer:

BC=√7

Step-by-step explanation:

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