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 day,
4 rupees for the third day and so 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?​

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

If, Rohit's father offers to pay him on the

first day = x

Then, the next days from the first day is x, 2x, 4x, 6x, 8x, 10x, 12x, 14x, 16x, 18x, .........etc

There fore,

Rohit's father offers him on the

tenth day is 18 rupees.