Reason + geometric progression - practice problems
Number of problems found: 10
A geometric sequence with six members has the sum of all six members equal to 63; the sum of the even members (that has even index) has a value of 42. Find these members.
-12, 60, -300,1500 need next 2 numbers of pattern
- Population growth
How many people will be on Earth from two people for 5,000 years, if every couple has always 4 children, (2 boys and 2 girls) at the age of 25-35, and every man will live 75 years?
- Saving 9
An amount of $ 2000 is invested at an interest of 5% per month. If $ 200 is added at the beginning of each successive month but no withdrawals. Give an expression for the value accumulated after n months. After how many months will the amount has accumula
- Probably member
Look at the series 2,6,25,96,285, ? What number should come next?
- Miraculous tree
Miraculous tree grows so fast that the first day increases its height by half the total height of the second day by the third, the third day by a quarter, etc. How many times will increase its height after 6 days?
Andrew wrote this series of numbers: 1,3,7,15, .... n. Which number in the series does not belong? ...
- Wood in the forest
The amount of wood in the forest was estimated at 6000 m³. How much wood will be in forest after 2 years if the annual growth of wood is 2.5% each year and logging 30 m³ each year?
- Compound interest
Calculate time when the deposit in the bank with interest 2.5% p.a. doubles.
- Loans, loan ...
In Slovakia, launched a short-term non-bank loans, of which few people have their "take" are considered unfavorable. Often, the borrower ends up in a spiral of debt, which takes more and more onerous loan used to repay earlier loans. Calculate how many 9-
Reason - practice problems. Geometric progression - practice problems.