qwerty9951
06.11.2020 •
Mathematics
Solve : sin 3x + cos 3x=0
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Ответ:
sin(3x)+cos(3x)=0sin(3x)=−cos(3x)tan(3x)=−13x=−
π
4
+kπ,k∈
Z
x=−
π
12
+
k
π
3
Since −<<
−
π
<
x
<
π
, −2≤≤3
−
2
≤
k
≤
3
. Thus, the solution set is
{−34,−512,−12,4,712,1112}
Ответ:
The sequence is a function as for any value of n we can not get more than one different
value.
Step-by-step explanation:
Tilly starts by running 1 mile in the first week and tripling the number of miles each week.
Now, the number of miles Tilly will run can be modeled by the sequence
, where n is the number of weeks since she began her program.
Therefore, in the second week she runs 3 miles, in the third week she runs 9 miles and so on.
Therefore, the sequence is a function as for any value of n we can not get more than one different
value. (Answer)