HELP NEEDED A.S.A.P. PLEASE & THANK YOU!!!!!!

Mathematics

1 answer:

andreev551 [17]3 years ago

4 0

Hello,

Answer B

y=-x^4+1
y'=-4x^3
y"=-12x² is always <0 : concavity downside.

You might be interested in

Find a_1 and d for an arithmetic sequence with these terms. a_4=9and a_7=18

jonny [76]

$\bf \begin{array}{llll}
term&value\\
-----&-----\\
a_4&9\\
a_5&9+d\\
a_6&(9+d)+d\\
&9+2d\\
a_7&(9+2d)+d\\
&9+3d=\underline{18}
\end{array}\\\\
-------------------------------\\\\
9+3d=18\implies 3d=9\implies d=\cfrac{9}{3}\implies \boxed{d=3}$

$\bf n^{th}\textit{ term of an arithmetic sequence}\\\\
a_n=a_1+(n-1)d\qquad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
d=\textit{common difference}\\
----------\\
n=7\\
d=3
\end{cases}
\\\\\\
a_7=a_1+(7-1)d\implies 18=a_1+(7-1)3\implies 18=a_1+18
\\\\\\
18-18=a_1\implies \boxed{0=a_1}$

3 0

4 years ago

What does this equal?

anzhelika [568]

It should be about 22.55.

4 0

4 years ago

Please need help!!!<br> Find the x

Tomtit [17]

Answer:

5.7 units

Step-by-step explanation: