I have a very important test. Please help.

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

Which is the graph of this function 3 square root of x plus one if