Can someone please help me with this? :(( Thank you! :))

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Write an introductory paragraph for this corrie ten boom and her family were faced with some difficult choices after hitler came to power. some family members paid the ultimate price. write a carefully thought-out paper of at least 200 words dealing with the following concepts: --how should a christian act when evil is in power? --what do you think it would be like to live in an occupied country? remember to proofread anything you write thoroughly.