four
Group b
The root sign of 1.( 1)300 is the square root of 8 of 45 and 6.
2.-2x+6 (- 1≤x≤7)
3.( 1) 3/2 radical 2bc square (A < 0, B ≥ 0, C ≤ 0)
(2) The 7th power of t is 10t (s > 0, t > 0).
4.3% 4ab radical 3ab (a ≥ 0, b > 0)
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Step 5 count down
6( 1) 3c (a >0,b≠0.c>0)
(2) the number of b elements a-B.
7.X = 10+2 roots 15.
8.A.
9.C
10. 12
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