The function f: Z -> Z, f(x) = 2x + 1 is injective and surjective, and therefore bijective. It is injective because for every pair of distinct integers x and y, f(x) and f(y) are distinct. It is surjective because for every integer z, there exists an integer x such that f(x) = z. Therefore, the function is bijective. **

The Nikkor Z 24-70 1:4 lens is not specifically designed for astrophotography, as it has a maximum aperture of f/4 which may not be ideal for capturing faint stars in low light conditions. For astrophotography, lenses with wider apertures such as f/2.8 or wider are generally preferred to allow more light to enter the camera sensor. However, the lens can still be used for astrophotography with longer exposure times and higher ISO settings to compensate for the narrower aperture. Overall, while the Nikkor Z 24-70 1:4 lens may not be the most suitable choice for astrophotography, it can still produce decent results with the right settings and techniques. **

Yes, the Nikkor 18-140mm f/3.5-5.6 is sufficient for acceptable landscape photos. The focal length range of 18-140mm allows for wide-angle shots to capture expansive landscapes, as well as the ability to zoom in for more detailed compositions. The variable aperture of f/3.5-5.6 may limit low-light performance, but for daytime landscape photography, it should be sufficient. Overall, this lens can produce sharp and detailed landscape photos when used appropriately. **

The Nikon AF Zoom Nikkor 70-300mm f/4-5.6G is a telephoto zoom lens. It has a focal length range of 70-300mm, making it suitable for capturing distant subjects such as wildlife, sports, or landscapes. The f/4-5.6G aperture range allows for flexibility in different lighting conditions, and the autofocus capability makes it easy to capture sharp, detailed images. Overall, this lens is a versatile option for photographers looking to expand their range and capture subjects from a distance. **

The Nikon AF Zoom Nikkor 70-300mm f/4-5.6G is a telephoto zoom lens. This type of lens is ideal for capturing subjects that are far away, such as wildlife, sports, or events. The 70-300mm focal length range allows for versatility in framing shots and achieving a shallow depth of field. The f/4-5.6 aperture range means that the lens can perform well in various lighting conditions. **

The main difference between the Nikkor 50mm 1.8G and the Nikkor 35mm 1.8G lenses is their focal length. The 50mm lens will provide a narrower field of view compared to the 35mm lens, making it more suitable for portraits and close-up shots. On the other hand, the 35mm lens will offer a wider field of view, making it better for capturing landscapes and group shots. Additionally, the 35mm lens may have slightly less background blur (bokeh) compared to the 50mm lens due to its wider angle of view. **

The size of a 38-40mm watch ultimately depends on personal preference and wrist size. For some people, this size may be considered too small, especially if they prefer a larger, more prominent watch face. However, for others, this size may be just right, especially if they have a smaller wrist or prefer a more understated look. It's important to try on the watch and consider how it looks and feels on your wrist before making a decision. **

After Dragonball Z, the series Dragonball Z Kai comes next. Dragonball Z Kai is a remastered version of Dragonball Z, with some scenes and dialogues edited for better pacing and accuracy to the original manga. It is essentially a more condensed and streamlined version of the original Dragonball Z series. **