Determine whether the series is convergent or divergent by expressing sn as a telescoping sum (as in example 7). [infinity] cos 2 n2 − cos 2 (n + 1)2 n = 1. if it is convergent, find its sum.

or

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:

can i know which language is this?