4+ 2 and 2+ 2
A rational number is a number that can be written as a ratio. That means it can be written as a fraction, in which both the numerator and the denominator are whole numbers.
On the other hand, all numbers that are not rational are considered irrational. An irrational number can be written as a decimal, but not as a fraction.
So, let us take two irrational numbers a=4+ 2 and b=2+ 2 and we now calculate a−b as follows: a−b=(4+ 2 )−(2+ 2)=4+ 2 −2− 2 =2= 1 2
Therefore, the difference of two irrational numbers a and b is 2 and from the above defination of rational numbers, we get that 2 is a rational number.
Hence, the difference of two irrational numbers 4+ 2 and 2+ 2 is a rational number.
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1. Mandela was jailed in 1962. 2. The law forbids marriage between whites and Africans in 1967. 3. Bantu homelands was created in 1970. 4. De klerk releases in 1989. He was president from 1994 to 1999.
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Calories are a measure of energy. One calorie is the heat energy that it takes to raise the temperature of one gram of water by one degree Celsius. There is some confusion, since in the food industry; the word Calorie actually refers to a kilocalorie, which is one thousand actual calories.
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since the sequence is geometric there is a common ratio r between consecutive terms, that is
r = 4 ÷ - 2 = - 2
r = - 8 ÷ 4 = - 2
r = 16 ÷ 8 = - 2
the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.
the first 4 terms are therefore geometric with common ratio r = - 2