Question

(1-i)(1-2i)(1-3i) what it is equal to

Answer 1

Answer:

Correct option (C) x2 + y2  

(1 + i) (1 + 2i) (1 + 3i) … (1 + ni)

= x + iy ...(1)

Taking conjugate, we get (1 – i) (1 – 2i) (1 – 3i) … (1 – ni) = x – iy ....(2) Multiplying Eqs. (1) and (2), we get (12 + 12) (12 + 22) …. (12 + n2) = x2 + y2  So, 2.5.10 … (1 + n2) = x2 + y2

Answer 2

Answer:

Spirogyra is a filamentous charophyte green alga of the order Zygnematales, named for the helical or spiral arrangement of the chloroplasts that is characteristic of the genus. It is commonly found in freshwater habitats, and there are more than 400 species of Spirogyra in the world. Sometimes they make food and sometimes they don't. An amoeba is animal-like because of its ability to move. It searches for its own food. A spirogyra is plant-like because of the presence of chlorophyll which allows it to make its own food.