Y = 4sin3x for function differentiation

Y = 4sin3x for function differentiation

12cos3x

Finding the differential of function y = x (arcsinx / 3) + (9-x ^ 2) ^ 1 / 2 + LN2

y=x(arcsinx/3)+(9-x^2)^1/2+ln2
dy=(arcsinx/3)dx+xd(arcsinx/3)-x/(9-x^2)^1/2dx
=[(arcsinx/3)+x/(9-x^2)^1/2-x/(9-x^2)^1/2]dx
=(arcsinx/3)dx

The differential of y = x ^ arcsinx
What I got was different from the answer. I took the logarithm of X on both sides, and then I took the derivative of the implicit function

Positive integers 1,4,7,10 Then the nth number is?

Each number is 3 larger than the previous one, so the nth number is 1 + (n-1) × 3 = 3n-2

What is the value of 1 × 2 / 1 + 2 × 3 / 1.49 × 50 / 1

＝1－1／2＋1／2－1／3＋1／3－1／4＋1／4－1／5‘‘‘＋1／49－1／50
＝1－1／50
＝49／50

A triangle △ 1.2 square meters, there are nine such triangles on the third floor, the area is 10.8 square meters

When stacking to t layer, s = {[1 + (2t-1)] * t} / 2 = T2 cm2

Solving equation (20-x) * 18-12 * x = 180

To solve the equation:
(20-x)*18-12*x=180
360-30x=180
30x=180
x=6 .

The diameter in the middle of a semicircle is 6 decimeters, find the perimeter and area!

Perimeter = 6 × 3.14 × 1 / 2 + 6 = 15.42 decimeters
Area = 3 × 3 × 3.14 × 1 / 2 = 14.13 square decimeter

How to simplify the calculation

1.5÷1.25
=(1.5x8)÷(1.25x8)
=12÷10
=1.2

As shown in the figure, AB equals DC, ad equals BC, de equals BF, so what is the relationship between be and DF

∵ AB = DC, ad = BC, ∵ quadrilateral ABCD is parallelogram
De ‖ BF, de = BF, dfbe is a parallelogram
Be and DF are parallel and equal