Fill in the blank with the correct numberQuestion 1:Complete the number pattern: 0,3,8,15,24,,48.Question 2:Find the area of the shaded region if A and B are squares of sides 5cm and 8cm respectively. Answer: The area of the shaded region is .(write your answer by decimal in simplest form)Question 3:If , compute =.Question 4:The side of each square grid is 2cm. Find the area of the shaded region.Answer: The area of the shaded region is .Question 5:If , find the value of m...
Đọc tiếp
Fill in the blank with the correct number
Question 1:
Complete the number pattern:
0,3,8,15,24,,48.
Question 2:
Find the area of the shaded region if A and B are squares of sides 5cm and 8cm respectively.
Answer: The area of the shaded region is .
(write your answer by decimal in simplest form)
Question 3:
If , compute =.
Question 4:
The side of each square grid is 2cm. Find the area of the shaded region.
Answer: The area of the shaded region is .
Question 5:
If , find the value of m in .
Answer: m=.
Question 6:
How many whole numbers between 1 and 100 are not divisible by 3 or 11?
Answer: numbers.
Question 7:
Evaluate:
=.
(round to four decimal places)
Question 8:
Evaluate:
=.
(write your answer by decimal in simplest form)
Question 9:
Find the whole number A knowing that A is 9 units greater than the average of A, 38, 45 and 67.
Answer: A=.
Question 10:
Find the whole number C knowing that C is 14 units smaller than the average of C, 68, 72, 99.
Answer: C=.
lx2+3+lx-3ll=(3-x)2
Vì (3-x)2 lớn hơn hoặc =0
=>x2+3+lx-3l=(3-x)2
=>x2+3+lx-3l=9-6x+x2
=>3+lx-3l=9-6x
=>lx-3l=6-6x
xét x<3:
=>-(x-3)=6-6x
=>-x+3=6-6x
=>6x-x=6-3
=>5x=3
=>x=0,6
xét x>(=)3:
=>x-3=6-6x
=>6x+x=6+3
=>7x=9
=>x=9/7<3 (trái giả thuyết)
vậy x=0,6
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