If the number can be written as 2*3*5 it cannot be prime!
250 written in index form = 2.5 × 102
2x2x2x2
No. In the index form a number is expressed as a multiple of its prime factors whereas in the standard form it is expressed as a number between in the range [1, 10) multiplied by an integer power of 10. So, for example, 1728 in index form = 26*33 1728 in standard form = 1.728*103 The index form can only be used for integers.
Oh honey, standard index form is just a fancy way of saying scientific notation. So, 450 would be written as 4.5 x 10^2. It's like saying "move the decimal point two places to the left and stick a 10 with an exponent in there." Easy peasy lemon squeezy!
If the number can be written as 2*3*5 it cannot be prime!
250 written in index form = 2.5 × 102
2x2x2x2
No. In the index form a number is expressed as a multiple of its prime factors whereas in the standard form it is expressed as a number between in the range [1, 10) multiplied by an integer power of 10. So, for example, 1728 in index form = 26*33 1728 in standard form = 1.728*103 The index form can only be used for integers.
Writing Numbers in Index FormWe know that: So, we can write 8 as 23.Likewise, 27 can be written as 33and 125 can be written as 53.So far, we have considered numbers that have a group of the same factors. Sometimes, a number has more than one group of the same factors as shown in the following example.Example 20Write 200 in simplest index form.Solution:Key Termsimplest index form
The expression 3x3x3x5x5 can be written in index form as 3^3 * 5^2. This is because the number 3 is repeated three times, which is represented by 3^3, and the number 5 is repeated twice, which is represented by 5^2. The multiplication operation is indicated by the asterisk (*) symbol.
Index form
Index form is where a number is expressed as the exponents of its prime factors. At the moment, you have it as its prime factors. We have two 3s, so that can be given as 32 and we have four 4s, so that can be given as 44. Thus 3x3x4x4x4x4 in index form is 32x44
"index" is the singular form - "indices" is the plural :)
Oh honey, standard index form is just a fancy way of saying scientific notation. So, 450 would be written as 4.5 x 10^2. It's like saying "move the decimal point two places to the left and stick a 10 with an exponent in there." Easy peasy lemon squeezy!
5524288 = 26*7*11*19
Well, darling, to write 18 in index form, you simply express it as 2^1 x 3^2. That's the fancy math way of saying 2 to the power of 1 times 3 squared. So, there you have it, 18 all dressed up in its index form finery.