Question

Not quite getting this

Answer 1

If a = 1111..........1 (55 times) , b= 1+10 + 10^2 + 10^3 +10^4 and c=1 +10^5 +10^10 +...........+10^50 , then prove that

(i) "a" is a composite number
(ii) a=bc

Answer 2

Multinomials?

Answer 3

Nope, I am actually learning Sequences and series

Answer 4

@primeralph

Answer 5

@Miracrown

Answer 6

@Hero

Answer 7

Use the formula for the sum of a a geometric series to find b and c first.
b = ?
c = ?

Answer 8

Okay after that

Answer 9

which one u need part b?

Answer 10

both

Answer 11

11111 = b= 1+10 + 10^2 + 10^3 +10^4
.....100010001= c=1 +10^5 +10^10 +...........+10^50
soo... if u look at long multiplication now

Answer 12

you will see that due to that shift by a decimal place u musth ave all 1s

Answer 13

How to prove (i) then