In each case, explain why the given statement is true [in no more than 3 simple sentences each.] a. the set to.-1 is neither open nor closed. b. 0 is not an accumulation point of s (1, 3]. c. for a sequence { a.) , there is one main difference between the statements "the sequence converges" and "the sequence is cauchy". what is that main difference?

2 5/8 is the final answer! : )

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

there is nothing below so i cannot

step-by-step explanation: