Sequence derivatives never work, and vector geometry doesn't work.
Shen Huawu was glad for the ten thousandth time that he had chosen liberal arts. He put down his blank winter vacation homework and went downstairs to soothe his mood.
Unfortunately among misfortunes, he bumped into the math teacher as soon as he hit the street. As if he was running away, he got into a store in a daze.
"Place, time, person." Shen Huawu was stunned for a moment and found that he could not find any of them with his human senses.
He only remembered that there was a wind chime at the door of the store that could ring, and there was a ghostly store manager in the store who couldn't speak well.
Ding-ding-ding-ding?
Unable to leave the store, his earnest eyes for help met the customers who entered the store.
Shen Huawu questioned his biology and language skills at the same time.
But no one taught him how to describe--
The faceless self
Intention: ideal (not)