Question

एक A.P. में यदि d=-4, , a=1 हो तो A.P. का चौथा पद क्या होगा: In an A.P. , d=-4, a=1 find 4th term of A.P. *​

Answer 1

Answer:

21

Step-by-step explanation:

here,

d=4,a=1

now,

a n=a+(n-1)d

=1+(4+1)4

=1+(5)4

=1+20

=21

hence,the 4th term of an this AP is 21