If a is not equal to B and
{ a^2 = 4a + 3,
{ B^2 = 4B + 3 ,
then ( a + 1) ( B + 1 ) =
Ans: 2
What are the steps?
F4 maths
2011-09-25 7:28 pm
回答 (3)
2011-09-25 9:01 pm
✔ 最佳答案
From the information given, a and b can be viewed as the roots of the quadratic equation x^2 - 4x - 3 = 0So, a + b = 4, ab = -3
(a + 1)(b + 1)
= (a + b) + ab + 1
= 4 - 3 + 1
= 2
2011-09-25 11:43 pm
2,NO STEPS
2011-09-25 7:46 pm
可視之為
a,b are roots of x^2-4x-3=0
a+b=4
ab=-3
(a+1)(b+1)
=ab+a+b+1
=4-3+1
=2
a,b are roots of x^2-4x-3=0
a+b=4
ab=-3
(a+1)(b+1)
=ab+a+b+1
=4-3+1
=2
收錄日期: 2021-04-16 13:24:52
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