1. Tìm đạo hàm riêng của các hàm số sau: a) f(x, y)=3x²+4xy+sin²(xy)
b) f(x, y)=(x+3y²) . e^(4xy)
2. Cho hàm số: f(x, y)=4x³+2x²y²+(3x+y²).e^x tìm df(x, y) , df(0,1) , d²f(0,-1)
3. Tìm z''xx , z''yy và z''xy trong các trường hợp sau:
a) z= 4x²y + x / (y²+1)
b) z= x²+y²+6x-8xy²+4y-6
c) z= (2x²+y³) . e^3x

your answer is -9

step-by-step explanation:

the given 6 = w/p is equivalent to 6p = w, where w is the total area of the walls and p is the area covered by a single can of paint.

knowing that 6 cans of paint will be needed, 6p = w becomes 6(6) = w = 36.   this tells us that the total area to be painted is 36 square units.

grace would use 12 apple slices

c.) 38 blocks

mark brainliest   : )