1.

13–√+4–√+14–√+5–√+15–√+6–√+16–√+7–√+17–√+8–√+18–√+9–√=?13+4+14+5+15+6+16+7+17+8+18+9=?

A. √3
B. 3√3
C. 3 - √3
D. 5 - √3
Answer» B. 3√3


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