An imaginary number is the product of a real number and the imaginary unit i, [note 1] which is defined by its property i2 = −1. [1][2] The square of an imaginary number bi is −b2. For example, 5i is an imaginary number, and its square is −25. The number zero is considered to be both real and imaginary. [3]

Oct 20, 2014 · In general, the rule of sqrt (a)*sqrt (b) = sqrt (a*b) only works when a and b are both positive reals. That's not the case here. symbolipoint said: You will understand better when you study Trigonometry. More simply, we can have a solution for x 2 +1=0.

Imaginary numbers are based on the mathematical number i i. i is defined to be −1−−−√ i is defined to be − 1. From this 1 fact, we can derive a general formula for powers of i i by looking at some examples.

Elemental iodine hence forms diatomic molecules with chemical formula I 2, where two iodine atoms share a pair of electrons in order to each achieve a stable octet for themselves; at high temperatures, these diatomic molecules reversibly dissociate a pair of iodine atoms.

Learn about powers of the imaginary unit and how to simplify them with examples and explanations.

Rewrite i2 i 2 as −1 - 1. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

Break the power down to show the factors of four. i, -1, -i or 1. • if the remainder is 0, the answer is 1 (i0). • if the remainder is 1, the answer is i (i1). • if the remainder is 2, the answer is -1 (i2). • if the remainder is 3, the answer is -i (i3). Divide the power by 4 to find the remainder. The answer is i3 which is -i. complex numbers.

As an imaginary unit, use i or j (in electrical engineering), which satisfies the basic equation i2 = −1 or j2 = −1. The calculator also converts a complex number into angle notation (phasor notation), exponential, or polar coordinates (magnitude and angle). Enter expression with complex numbers like 5* (1+i) (-2-5i)^2.

Iodine is a naturally occurring element found in sea water and in certain rocks and sediments. There are non radioactive and radioactive forms of iodine. Iodine is used as a disinfectant for cleaning surfaces and storage containers and is used …

Aug 27, 2017 · In case of I 2, we usually define what means high, moderate or low. For example, if you define that I 2 > 75% is considered as substantial heterogeneity and I 2 of your meta-analysis is...