Question

यदि d = - 4 n = 7 an = 4 a का मान ज्ञात करो​

Answer 1

Answer:

an=a+(n-1) ×d

a=an×(n-1) ×d

a=4×(7-1) ×(-4)

last line you can do

Answer 2

an =a+(n-1) d

an =4, n=7, d=-4

then,

4= a + (7-1)- 4

-a=-24-4

-a=-28

a=28