Find the explicit formula of the given sequence.

Question

arithmetic: a2 = 5 , a5 = -4 

geometric: a2 = 75 , a5 = 600.

Answer 1

Arithmetic Explicit formula

and

and

Subtract the two equations

Substitute the  above equation .

Arithmetic Explicit formula

Geometric Explicit formula

Divide the above two equations

r  value substitute the above equation

Geometric Explicit formula

Comments

Sorry type of mistake

Arithmetic Explicit formula