Question

F(a)=2*5^a-1; find f(1)

Answer 1

f(1)=9

Explanation:

given f(a)=2*5^a-1..............(1)

f(a)=
`2*5^a`-1

put a=1 in equ (1)

f(a)=
`2*5^1`-1

f(1)=
`2*5`-1

f(1)=10-1=9

f(1)=9 answer