Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
What is the sum of the first 15 terms of an A.P whose 11 th and 7 th terms are 5.25 and 3.25 respectively
What is the sum of the first 15 terms of an A.P whose 11 th and 7 th terms are 5.25 and 3.25 respectively
In an arithmetic series consisting of 51 terms, the sum of the first three terms is 65 and the sum of the middle three terms is 129. What is the first term and the common difference of the series?
In an arithmetic series consisting of 51 terms, the sum of the first three terms is 65 and the sum of the middle three terms is 129. What is the first term and the common difference of the series?
How many terms are there in the GP 5, 20, 80, 320........... 20480?
How many terms are there in the GP 5, 20, 80, 320........... 20480?
If \((1^2+2^2+3^2+…..+10^2)=385,then\;the\;value\;of (2^2+4^2+6^2+…+20^2 \)is:
If \((1^2+2^2+3^2+…..+10^2)=385,then\;the\;value\;of (2^2+4^2+6^2+…+20^2 \)is:
Find the 15th term of an arithmetic progression whose first term is 2 and the common difference is 3.
Find the 15th term of an arithmetic progression whose first term is 2 and the common difference is 3.
Find the 15th term of the sequence 20, 15, 10....
Find the 15th term of the sequence 20, 15, 10....
The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
How many terms are there in 20, 25, 30......... 140
How many terms are there in 20, 25, 30......... 140
The sum of the first 100 numbers, 1 to 100 is divisible by
The sum of the first 100 numbers, 1 to 100 is divisible by