00:01
According to the question we have to find out first 4 term a10 and a15, we have the given a and term is minus 1 raised to power n minus 1 and 3 and minus 5.
00:16
We know that we find out first 4 term.
00:19
We put the value of n is 1, 2, 3 and 4.
00:23
When we put the value of n is 1, we find out a1, there is first term, minus 1, 1, 3, 1 minus 5.
00:35
When we solve, the result will be minus 2 because minus 1 is rest to power 0.
00:43
Anything rest to power 0 is equal to 1, and 3 1 is 3, 3 minus 5, there is minus 2.
00:49
Similarly, we find out the value of a2.
00:53
We put the n is 2 in that case.
00:57
There is the result will be minus 1.
01:03
When we solve, we know that any negative term power is 1.
01:07
There is always negative term...