makayyafreeman
28.06.2019 •
Mathematics
The graph of a cosine function is shown. plot the line that represents the midline of the given periodic function.
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Ответ:
y=3 is the midline of the given cosine function.
Step-by-step explanation:
The midline is a horizontal axis that acts as a reference line about which a graph of a periodic function oscillates.
It is the average of maximum and minimum values of the function.
The maximum value of the cosine function is y=4
The minimum value of the cosine function is y=2
∴ The midline of the cosine function = (4+2)/2 = 3
Hence, y=3 is the midline of the given cosine function.
Refer attachment for the graph.
Ответ:
sjc
Feb 27, 2017
325
Explanation:
One way is:
write down the series twice one in ascending order the other descending
1
+
2
+
3
+
4
+
...
...
...
...
...
...
...
...
.
+
22
+
23
+
24
+
25
25
+
24
+
23
+
22
+
...
...
...
...
...
.
+
4
+
3
+
2
+
1
note that by pairing off and adding we obtain the same sum ie.
26
there are 25 such pairs, but we have also double the sum required .
thus
S
=
(
25
×
26
)
÷
2
S
=
325