Question

1. Rohit's father offers to pay him 1 rupee for doing some work the first day, 2 rupees for doing it the second days
4 rupees for the third day and so on, doubling
on, doubling each day. Write an expression using exponents for the amount
Rohit will get paid on the tenth day. How much money is it?
Lad
1​

Answer 1

Answer:

and is 20 for 10th day or total amount is 91.

Step-by-step explanation:

the expression is 1,2,4,8.....

for 10th day n*2=10*2=20

and for total amount

1,2,4......,n*2

=1+2(1+2+...+9)

=1+2(9/2(2(1)+9-1(1)) [it's the formula for the sum of simple series.]

=1+2(9/2(10))

=1+2(45)

=91

Answer 2

Step-by-step explanation:

Rohit' s father offers to pay him first day = 1 rupee

He offers second day = 2 rupee

Third day =4 rupee

fourth day= 4×2=8

Fifth day= 8×2= 16

Sixth day= 16×2=32

seventh day= 32×2 =64

eight day= 64 × 2=128

nineth day= 128 × 2=256

tenth day= 256×2=512

Tenth day= 512