Define f: n rightarrow z be defined as follows: for each n n, f(n) = 1 + (-1)^n (2n - 1)/4. is the function f an injection? is the function f a surjection? justify your conclusions. suggestions. start by calculating several outputs for the function before you attempt to write a proof. in exploring whether or not the function is an injection, it might be a good idea to uses cases based on whether the inputs are even or odd. in exploring whether f is a surjection, consider using cases based on whether the output is positive or less than or equal to zero.

the answer is; biodiversity resulting from few ancestors

adaptive radiation occurs when a population is subjected to a large natural environment with spatial ecological variations. the parts of the population in the different ecologies begin to adapt to their local environments. due to non-random mating across the large populations, this causes the different populations from the large population to speciate within their local environments. they, therefore, diverge to different species sharing a common ancestor.  

i think the correct option is the second option.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0