Question

if the first term of an AP is -5 andthe common difference is 2 then sum of the first 6 term is​

Answer 1

Step-by-step explanation:

a=-5,d=2,

Then 1st term -5

Then 2nd 5erm is a+d=-5+2=-3

3rd term =-1

4the term =1

5the term=3

6the term =5

Sum of 6 terms is -1+-3+-5+1+3+5=0

Answer 2

Answer:

Given, First Term=   -5

common Difference=  2

Now,According to formula,

Sum of first 6 terms=6/2[2(-5)+(6-1)2]

                                  =3[-10+10]

                                  =3(0)

                                  =0

Hence,The sum of first 6 terms=0