Question 14: (a+4)(a+2)=a2+8(a+4)(a+2)=a2+8Answer: =a2+2a+4a+8=a2+6a+8=a2+2a+4a+8=a2+6a+8Question 15: (a–4)(a–2)=a2–8(a–4)(a–2)=a2–8Answer: a2–2a–4a+8a2–2a–4a+8=a2–6a+8=a2–6a+8Question 16: 3x2÷3x2=03x2÷3x2=0Answer: = 1...
Solution:Some of the five rational numbers smaller than 2 can be written as follows: 1,1212, 0,−12-12,−1-1 Alternate method: Given number 2 can be written as6363 And thus, some of the five rational numbers smaller than 2 can be written as follows: ...
CBSE Class 8 Maths Additional practice questions, NCERT Solution for exercise for all topics and exercises of CBSE Class VIII Math. With video solutions. CBSE Class 9 Maths NCERT Extra questions for class 9 maths. All chapters and exercises for Class IX CBSE. Includes video explanations. CBSE ...
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Engage your students with this game-based classroom-response system played by the whole class in real time. Multiple-choice questions are projected on the screen, then students answer with their smartphone, tablet, or computer. (Grades K–12; free, Kahoot+ AccessPass subscription offers premium ...
class Solution { public: bool isPowerOfFour(int num) { if (num < 0 || num & (num-1))//排除不是2的幂次的数 { return false; } return num & 0x55555555;//可以改为return num%3==1; } }; 关于num%3==1 ,由于 4=3+1, 那么4的N次方就是(3+1)^N,尝试展开多项式,比如(3+1)^2...
Example 1 is obvious to this guest whose PhD research topic is inDifferential Geometry “Chern Class” invented by Prof S. S. Chern (陈省身) : Example 2 is obvious to this guest unless he/she can’t count the number of sides (8): ...
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ParserNG comes with a FunctionManager class that allows users persist store functions for the duration of the session(JVM run). You may create and store a function directly by doing: FunctionManager.add("f(x,y) = x-x/y"); And then retrieve and use the function like this: ...
class Solution: def myAtoi(self, s: str) -> int: # Positive sign positive = True result_str = '' digits = ['0','1','2','3','4','5','6','7','8','9'] signs = ['+','-'] # Has the first non-space been encountered started = False # Has the first sign been enco...