Question

Pls answer, you can get 100 points for answering, I'd give more but i can't.

Answer 1

Step-by-step explanation:

All steps are in picture.

If you have any question about it you can ask.

Thanks

Answer 2

#a

• a(1)=1
• a(n)=3a(n-1)

$\\ \sf\longmapsto a(2)=3a(1)=3(1)=3$

$\\ \sf\longmapsto a(3)=3a(2)=3(3)=9$

$\\ \sf\longmapsto a(4)=3a(3)=3(9)=27$

$\\ \sf\longmapsto a(5)=3a(4)=3(27)=81$

#b

• b(1)=1
• b(n)=-2+b(n-1)

$\\ \sf\longmapsto b(2)=-2+b(1)=-2+1=-1$

$\\ \sf\longmapsto b(3)=-2+b(2)=-2-1=-3$

$\\ \sf\longmapsto b(4)=-2+b(3)=-2-3=-5$

$\\ \sf\longmapsto b(5)=-2-5=-7$