Khai triển các hàng đẳng thức đàn nhớ sau a) (a+2)>2
b (2a - b)>2
c) (2a-1)>3
d) (2x-1)(2x+1)
e) 27>3 - 1
f) (a-1)>3
g) (a-1)>2

d

step-by-step explanation:

i used the pitagoras theoreme

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

i think its a.

hope this