a)Lực ma sát trượt.

b)Lực ma sát lăn.

c)Lực ma sát nghỉ.

\(A=\frac{373737.43-434343.37}{2^{2016}-2^{2015}}=\frac{37.10101.43-43.10101.37}{2^{2016}-2^{2015}}=\frac{0}{2^{2016}-2^{2015}}=0\)

Vậy A=0

tick nhé

a)\((\dfrac{5}{7}x^2y)^3:(\dfrac{1}{7}xy)^3\)

=\((\dfrac{5}{7}x^2y:\dfrac{1}{7}:x:y)^3\)

=(\(\dfrac{5}{7}.7.x^2:x.y:y)^3\)

=(5x)\(^3\)

=5\(^3\).x\(^3\)

=125.x\(^3\)

a)\([\)5(a-b)\(^3\)+2(a-b)\(^2]\):(b-a)\(^2\)

=\([\)5(a-b)\(^3\)+2(a-b)\(^2]\):(a-b)\(^2\)

=5(a-b)+2

b)5(x-2y)\(^3\):(5x-10y)

=5(x-2y)\(^3\):5(x-2y)

=(x-2y)\(^2\)

c)(x\(^3\)+8y\(^3\)):(x+2y)

=\([\)x\(^3\)+(2y)\(^3]\):(x+2y)

=(x+2y)(x\(^2\)-2xy+4y\(^2\)):(x+2y)

=x\(^2\)-2xy+4y\(^2\)

Hình như sai đề