Question

A.P.: 3,8, 13, 18,... का कौन सा पद 78 है?​

Answer 1

Answer:

16

Step-by-step explanation:

by formula of AP

78=3+(n-1)5

75/5=n-1

15+1=n

Answer 2

a = 3

d = 5

78 = a+(n-1)d

78 = 3 + ( n - 1 ) 5

78 = 3 + 5n - 5

78 = -2 + 5n

78 +2 = 5n

80 = 5n

80/5 = n

16 = n

अतः 16वाँ पद 78 है।