X^2(2x^2+1)+x(2x^2-7)-150=
9*19-33-150=-12
<u><em>1</em></u>81<em><u>6</u></em>1512<em><u>1</u></em>
811512 ÷ 12= 67626
Х в 5 ст=-1215:5
х в 5 ст=-243
х= -3
1)y`=(7-2x)/2√(-10+7x-x²)=0
7-2x=0⇒2x=7⇒x=3,5∈[3;5]
y(3)=√(-10+21-9)=√2 наиб
y(3,5)=√(-10+24,5-12,25)=√2,25=1,5
y(5)=√(-10+35-25)=0 наим
2)ф=2 и=4 р=4
Ы=(ф+и)*р/2
Ы=(2+4)*4/2=12
<span>sina^2a=1-cos^2a=1-9/25=16/25</span>
<span>sina=4/5</span>
<span>sin2a=2sinacosa=2*4/5*3/5=24/25</span>
<span>cos2a=cos^2a-sin^2a=9/25-16/25=-7/25</span>
<span>tg2a=sin2a/cos2a=24/25*(-25/7)=-24/7</span>