Who can help me explain what the principle is? First, choose a number (0 - 7) to indicate the number of times you want to go out every week. Multiply this number by 2 [3], then add 5 [4], and then multiply by 50 [5]. If your birthday this year has passed, add 1757 to the number. If not, add 1758 [6] the last step, Use this number to subtract the year of your birth [7] and now you will have a three digit number [8]. The first digit is the number you choose at the beginning (that is, the number of times you want to go out every week). The next two digits are your age (birthday is one year old, birthday is empty year old)

Who can help me explain what the principle is? First, choose a number (0 - 7) to indicate the number of times you want to go out every week. Multiply this number by 2 [3], then add 5 [4], and then multiply by 50 [5]. If your birthday this year has passed, add 1757 to the number. If not, add 1758 [6] the last step, Use this number to subtract the year of your birth [7] and now you will have a three digit number [8]. The first digit is the number you choose at the beginning (that is, the number of times you want to go out every week). The next two digits are your age (birthday is one year old, birthday is empty year old)

Supplement 0 * 2 = 0 + 5 = 5 * 50 = 250 + 1757 = 2007 1 * 2 = 2 + 5 = 7 * 50 = 350 + 1757 = 2107 2 * 2 = 4 + 5 = 9 * 50 = 450 + 1757 = 2207 3 * 2 = 6 + 5 = 11 * 50 = 550 + 1757 = 2307 4 -------- 2407 5 -------- 2507 6 -------- 2607

Explain the demand theorem with substitution effect and income effect

The substitution effect refers to the influence of the price change of a commodity on its demand under the condition of constant real income. That is to say, if the price of a commodity rises and the price of other commodities does not change, then the relative price of other commodities falls, and consumers will use other commodities to replace this commodity, thus affecting this commodity