Question

find out first term of "-1," "-3," "-5," "-7..."​

Answer 1

Answer: The first term is -1

Step-by-step explanation:

Given series,

"-1," "-3," "-5," "-7..."

Here the first term is -1

Common difference of series is -2

Second term is -3

Third term is -5

Fourth term is -7

Next term also can find using formula (f+(n-1)d) or we know the common difference of series so just just add with last element with -2

Eg: We have to find the fifth term,

an=f+(n-1)d

Here f=-1,n=5,d=-2

So, -1+(5-1)-2

=-1+4x-2

=-1+-8

=-9

So the fifth element is -9