Question

Help pls!?!?!?!!! This is algebra 2

Answer 1

`\boxed{\sf a_n=((-1)^n)/(5n)}`

a:-

`\\ \sf\longmapsto a_1=((-1)^1)/(5(1))`

`\\ \sf\longmapsto a_1=(-1)/(5)`

`\\ \sf\longmapsto a_1=-5`

b:-

`\\ \sf\longmapsto a_4=((-1)^4)/(5(4))`

`\\ \sf\longmapsto a_4=(1)/(20)`

c:-

`\\ \sf\longmapsto a_(30)=((-1)^(30))/(5(30))`

`\\ \sf\longmapsto a_(30)=(1)/(150)`

d:-

`\\ \sf\longmapsto a_(19)=((-1)^(19))/(5(19))`

`\\ \sf\longmapsto a_(19)=(-1)/(95)`