Question

find the number of terms in each of the fillowing AP's 18,15 1/2,13,......,-47​

Answer 1

Answer:

step 1

Step-by-step explanation:

Ap :18, 15 , 1/ 2, 13, ...._ 47.Given , a= 18( first term),d= 15 _ 18 =3( common difference) , an = _ 47( last term), to find n= ? ( number of terms) formula , an = a+(n _ 1) ×d .plotting the value in formula. an = a+( n_ 1) × d..........solution = _ 47 = 18+( n _ 1) × 3= _ 47 = 18 + 3n _ 3= _ 47_ 18= 3n_ 3=_ 65+ 3 = 3n= _ 62 = 3n , = 3n = 62, = n = 62/ 2 = 31 term ...... is the answer