1) S =интеграл(1- x² -(x² -1))dx =интеграл 2(1-x²)dx =2(x-x³/3)| a =-1 b=1
=2(1 -1³/3 -(-1 -(-1)³/3 ) =2*2(1-1/3 ) = 8/3.
* * * 1- x² =x² -1⇔2x² =2 ⇔x² =1 ⇒x =± 1 a = -1 ; b=1 * * *
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2) y = - 4x² , E(y) =( -∞ ;0] .
y =tqx -1 , E(y) =( -∞ ;∞).
y=|x|+4 , E(y) =[ 4 ;∞).
y=|x-4| , E(y) =[ 0 ;∞).
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3) y=x²+2x ;
y=x²+2x= x²+2x +1 -1 =(x+1)² -1 . B(-1 ; -1).