Cho 2 hình bình hành ABCD và ABEF . M, N lần lượt là trung điểm của CD, BE. Chứng minh rằng MN // mặt phẳng BDF

this is not the answer this is just a question. is this middle school math?

step-by-step explanation:

you already gave the answer

step-by-step explanation:

the answer is:

the answer is:

to solve the problem, we need to remember the quotient of power property, it's defined by the following relation:

if we have a quotienf of powers that have the same base, we need to keep the same base and subtract the exponent of the denominator power to the exponent of the numerator power.

so, we are given the expression:

then, calculating we have:

hence, the answer is:

have a nice day!