配套习题- 含字母参数的一元二次方程的解法 -【青果学院】

1/5单选题

难度：

1.若

，则

的值是（）

A
B	2
C
D	4

正确答案：Qg==

PGRpdj7op6PvvJrvvIhhK2IrMe+8ie+8iGErYi0x77yJPTE177yMPGJyPuWPmOW9ouW+l++8mlvvvIhhK2LvvIkrMV1b77yIYSti77yJLTFdPTE177yMPGJyPuWNs++8iGErYu+8iTxzdXA+Mjwvc3VwPi0xPTE177yMPGJyPuenu+mhueW+l++8mu+8iGErYu+8iTxzdXA+Mjwvc3VwPj0xNu+8jDxicj7iiLRhK2I9NOaIlmErYj0tNO+8jDxicj7lj4hhK2LiiaUw77yM4oi0YStiPS006IiN5Y6777yMPGJyPuKItGErYj0077yMPGJyPuWImTxpbWcgd2lkdGg9NjggaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRkMvODIvckJBQ0ZGTUp1LXFpVFJBUkFBQUNEWDBQVTQ4NjU4LnBuZyI+LiA8YnI+5pWF6YCJQi4gPC9kaXY+

2/5单选题

难度：

2.下面方程一定有解的是（）

A	（x+5）²=a²+1
B	（x-3）²+1=0
C	（x+a）²=b
D	（ax+3）²+a²=0

正确答案：QQ==

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

3/5单选题

难度：

3.在实数范围内定义运算“⊕”，其法则为：a⊕b=a²-b²，则方程（4⊕3）⊕x=24的解为（）

A
B
C
D

正确答案：Qw==

PGRpdj7op6PvvJrnlLHpopjmhI/lvpfvvJo04oqVMz0xNi05PTfvvIw8YnI+N+KKlXg9MjTvvIw8YnI+NzxzdXA+Mjwvc3VwPi14PHN1cD4yPC9zdXA+PTI077yMPGJyPuenu+mhueW+l++8mng8c3VwPjI8L3N1cD49MjXvvIw8YnI+5Lik6L6555u05o6l5Y2h5bmz5pa55b6X77yaeD3CsTXvvIw8YnI+5pWF6YCJ77yaQy4gPC9kaXY+

4/5单选题

难度：

4.一元二次方程2x²+px+q=0的两个根为3，4，那么因式分解二次三项式2x²+px+q=（）

A	（x-3）（x-4）
B	（x+3）（x+4）
C	2（x-3）（x-4）
D	2（x+3）（x+4）

正确答案：Qw==

PGRpdj7op6PvvJriiLXkuIDlhYPkuozmrKHmlrnnqIsyeDxzdXA+Mjwvc3VwPitweCtxPTDnmoTkuKTkuKrmoLnkuLoz77yMNO+8jDxicj7iiLTkuozmrKHkuInpobnlvI8yeDxzdXA+Mjwvc3VwPitweCtxPTLvvIh4LTPvvInvvIh4LTTvvIkuIDxicj7mlYXpgIlDPC9kaXY+

5/5单选题

难度：

5.关于x的一元二次方程（a-1）x²+x+a²+3a-4=0有一个实数根是x=0，则a的值为( )

A
B	1
C
D

正确答案：Qw==

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