If a is a nilpotent element of r, a ring with identity, establish that 1 + a is invertible in r.
[hint: (1 + a)-1 = 1-a + a^{2} + + (-1)-1(a)n-1, where (a)^{n}=0]

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

26?

step-by-step explanation:

14

step-by-step explanation:

14 x 3 = 42

80

step-by-step explanation: