Let the radius of a circle with an area of 6 π be X (1) Is x a rational number? Tell me your reasons. (2) estimate the value of X (the result is accurate to the tenth), and use a calculator to verify your estimation. (3) what if the result is accurate to the hundredth?

Let the radius of a circle with an area of 6 π be X (1) Is x a rational number? Tell me your reasons. (2) estimate the value of X (the result is accurate to the tenth), and use a calculator to verify your estimation. (3) what if the result is accurate to the hundredth?

Area = π X & sup2; = 6 π
x²=6
6 is not a perfect square
So x is not a rational number
2.44²=5.9536
2.45²=6.0025
So 2.44

The square roots of a positive number are 2m + 3 and M + 1. Can you find this number?

∵ the square roots of a positive number are 2m + 3 and M + 1, ∵ ① 2m + 3 + m + 1 = 0, the solution is m = - 43, ∵ m + 1 = - 43 + 1 = - 13, ∵ the number is (- 13) 2 = 19; ② 2m + 3 = m + 1, the solution is m = - 2, ∵ m + 1 = - 2 + 1 = - 1, ∵ the number is (- 1) 2 = 1

English translation
No matter how far away we are, as long as there is a sky in our hearts, as long as the doctor's greetings occasionally bring us a knowing smile

Regardless of how far we apart,we will smile just for a occasional greeting,for we leave a place for each other in our heart.