Question

5. Which term of A.P. :- 15.12.....is zero(0)?
Or.In an A.P..if a=-18.n=10. a,=0,then d=!
​

Answer 1

Step-by-step explanation:

In engineering, a foundation is the element of a structure which connects it to the ground, and transfers loads from the structure to the ground. Foundations are generally considered either shallow or deep

Answer 2

Answer:

hope u will like the ans... pls follow me

Step-by-step explanation:

ThegivenA.Pis21,18,15.....

so,

a=21

a+d=18

∴d=−3

now

a(nthterm)=a+(n−1)d

⇒0=a+(n−1)d

⇒0=21+(n−1)(−3)

⇒n−1=

−3

−21

⇒n−1=7

⇒n=7+1

∴n=8

Hence,therequiredtermis8.