00:01
According to the question we have to find out first four term and a10 and a15, we have the given an is, there is minus 1 raise to power n and n square.
00:19
When we solve, we know that we find first four term there is 1, 2, 3 and 4.
00:26
When we put n is equal to 1 we find out a 1 there is a first term when we put n is 1 1 square we find out 1 square is a 1 and minus 1 there is minus 1 similarly we find out a 2 a 2 the second term we put the value of n is 2 there is 2 square we know that any negative term square is always positive and 2 square is a 4.
01:05
Similarly we find out a 3.
01:09
A3 is a third term.
01:13
In that case we put the value of n is 3.
01:16
When we put the value of n is 3, there is 3, 3 square.
01:23
3 square is a 9.
01:26
And any negative negative 2, 3.
01:28
Term power is a odd number.
01:32
The final result will be a negative.
01:36
There is a minus 9.
01:38
Similarly, we find out the fourth term...