(1)代入圆形方程.x2+(x−k)2+2x−4(x−k)−1=0x2+π2−2kx+k2+2x−4x+4k−1=02x2−2kx−2x+k2+4k−1=0Let the root of the equation be α and β.设方程的根为 α及β .α及β分别是A点和B点的x坐标.mid-point of ABAB的中点=α+β2=−−2k−222=k+12=...
k1=1; k2=2; k3=3; x=15; if(!k1) x--; else if(k2) x=4; else x=3;A 14B 4C 15D 3
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If sin theta, sin k theta are the roots of 4x^2+2x-1=0, then k = 02:11 If sec^2theta(1+sintheta)(1-sintheta)=k , then find the value of k ... 02:07 If sin theta,sin k theta are the roots of 4x^(2)+2x-1=0, then k= 02:11 D (k) = | 2 ^ (k-1) (1) ...
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解析 由角预对:, 解得:dnagt 34且mreteq 2, \be表弦正se k为偶数, \thtsimonoce的最小值为4$. 故答案为:轴称对. 【判别式】 将配方成后,可以看出,只有当时,方程才有实数根,这样的值就决定着一元二次方程根的情况.一般地,式子叫做方程根的判别式,通常用希腊字母表示它,即....
由k1 = 1 . 所以 !k1 = false 进入其他分支 k2 = 2 .为true .. 所以 是 x= 4 选 D. 本题考查汉字的正确读音。正确读音如下: * 钢琴(gāng✓) * 欢迎(yíng✓) * 环绕(rào✓) * 飞翔(xiáng✓) * 银杏(yín✓) * 捕捉(bǔ✓) * 惊恐(jīng✓) * 使劲(jìn...
View Solution If ∫10(3x2+2x+k)dx=0, find the value of k. View Solution If ∫10(3x2+2x+k)dx=0, find the value of k. View Solution If −1+i is a root of x4+4x3+5x2+k=0 then its real roots are View Solution
Step by step video, text & image solution for If x^(2)+xy-2y^(2)+4x-y+k=0 represents a pair of straight lines, find k. by Maths experts to help you in doubts & scoring excellent marks in Class 11 exams.Updated on:21/07/2023Class...
j=sqrt(k); //平方根计算 } //语句块1 if ( (x==4)||(y>5) ) { j=x*y+10; } //语句块2 j=j%3; //语句块3 } 答案: 语句覆盖测试用例:x=4、y=5、z=5; 判定覆盖测试用例:x=4、y=5、z=5;x=2、y=5、z=5...点击...