When x is what kind of real number, the following quadratic radical is meaningful (1) √ x + 1 (2) √ 3x-2 (3) √ 2x + 1 / 3 (4) √ 3-2x / 1

When x is what kind of real number, the following quadratic radical is meaningful (1) √ x + 1 (2) √ 3x-2 (3) √ 2x + 1 / 3 (4) √ 3-2x / 1

（1）x+1≥0 x≥-1
（2）3x-2≥0 x≥ 2/3
（3）2x+1＞0 x＞-1/2
（4）3-2x＞0 x＜3/2

Find the rational number of the first day of mathematics, add 10, subtract 10, multiply 10, divide 10

1、 Fill in the blanks (14 × 2 = 28) 1. If the opposite number of a certain number is 5, then the number is;, then. 2. () 2 = 16, (-) 3 =. 3. + =. 4. Calculation: - 2-32 =________ 5. If 0 ＜ 1, then the size relation is.. 6.134756 ≈ (keep four significant numbers); 358 million accurate to

-13*2/3-0.34*2/7+1/3*-5/7*0.34

The idea of this kind of problem is to merge similar items and simplify them
The original formula has been sorted out
-13×2/3 -13×1/3 -0.34×2/7 -0.34×5/7
Extracting the common factor
-13×（2/3+1/3）-0.34×（2/7+5/7）
= -13×1-0.34×1
=-13-0.34=13.34