a && b) == (a || b) 怎么化简?Which of the following best describes the set of all \x05\x05pairs of values for boolean variables a and b,\x05\x05such that(!a && b) == (a || b)evaluates to true?A Empty setB Only one pair:\x05\x05\x05\x05 a == true,

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a && b) == (a || b) 怎么化简?Which of the following best describes the set of all \x05\x05pairs of values for boolean variables a and b,\x05\x05such that(!a && b) == (a || b)evaluates to true?A Empty setB Only one pair:\x05\x05\x05\x05 a == true,
a && b) == (a || b) 怎么化简?
Which of the following best describes the set of all \x05\x05pairs of values for boolean variables a and b,\x05\x05such that(!a && b) == (a || b)
evaluates to true?
A Empty set
B Only one pair:\x05\x05\x05\x05 a == true,b == false
C Two pairs in which\x05\x05\x05\x05 a == true
D Two pairs in which\x05\x05\x05\x05 a = b
E All four possible \x05\x05\x05\x05combinations of values
直到答案是C
我是怎么想的：把右面的!移到左边,左边变为a || b ,这种想法对么?
如果不对的话,

a && b) == (a || b) 怎么化简?Which of the following best describes the set of all \x05\x05pairs of values for boolean variables a and b,\x05\x05such that(!a && b) == (a || b)evaluates to true?A Empty setB Only one pair:\x05\x05\x05\x05 a == true,
你的思路是对的,下一步就是
a或!b == a 或 b
但是b和!b中间一定有一个1,有个0
也就是说 a + （0） == a + (1) ——或就是+
带入a==0,错了,左边是0.右边是1
带入a==1就对了,两边都是1.

A-B=A/B a-b=360 a=b+b+b+b a=( )b( )a-b=360 a=b+b+b+b a=( )b( ) 求矩阵A的秩：A=（a,b,b,b b,a,b,b b,b,a,b b,b,b,a) A+A+A+B+B+=23,B+B+A+A+A+A+A=33,A=?,B=? D= a b b----bb a b----bb b a----bb b b----a A+A+B+B=36A+A+B+B+B+B+B=60A=?B=? A+A+A+B=52 A+B+B+B=36 A= B= A+A+A+B+B=6.5.A+B+B=5.A=?.B=?. A+A+A+b+b＝6.5 A+b+b=5 A= b= a+a+b+b+b=6.5 b+b+a+a+a=7求ab 化简a/b(a-b)-b/a(a-b)其中a=3 b=-2 a/b=2 ,(a*a-ab+b*b)/(a*a+b*b)= 若a/b=2 则a*a-ab+b*b/a*a+b*b等于? (a+b)²+a(a+b)+(a+b)b+(a+b)³=?因式分解 A+B=A∪B+A∩B A∪B?A∩B 如果a/b=2则a*a-ab+b*b/a*a+b*b求值 a-b分之a+2b+b-a分之b-a-b分之2a= a+2b/b-a+b/a-b-2a/b-a=?