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Find the sum of the geometric sequence. (7 points)
4 divided by 3, 16 divided by 3, 64 divided by 3, 256 divided by 3, 1024 divided by 3
Answers
Answer:
Sample: 205 divided by 2 using long division
Divide each digit of the dividend with the divisor starting from left to right. Bring down the next digit after each step as shown below:
1.
1
2 2 0 5 .
− 2
0
Divide 2 by 2. Write the remainder after subtracting the bottom number from the top number.
2.
1 0
2 2 0 5 .
− 2
0 0
− 0
0
Bring down next digit 0. Divide 0 by 2. Write the remainder after subtracting the bottom number from the top number.
3.
1 0 2
2 2 0 5 .
− 2
0 0
− 0
0 5
− 4
1
Bring down next digit 5. Divide 05 by 2. Write the remainder after subtracting the bottom number from the top number.
4. Put the decimal point.
5.
1 0 2 . 5
2 2 0 5 . 0
− 2
0 0
− 0
0 5
− 4
1 0
− 1 0
0
−
Remember: A decimal number, say, 3 can be written as 3.0, 3.00 and so on. Bring down next digit 0. Divide 10 by 2. Write the remainder after subtracting the bottom number from the top number.
End of long division (Remainder is 0 and next digit after decimal is 0).
205 ÷ 2 = 102.5