Question

3. Find the first term and common difference of the Arithmetic Progressions whose
terms are given below
(i) t = -3+2n (ii) t = 4-7​

Answer 1

Answer:

(i) t= -3+2n

a1= -3+2(1)

a1=-3+2

a1=first term = -1

a2=-3+2(2)=-3+4=1

d=a2-a1

d=1-(-1)

d=1+1

d= common difference=2

(ii) t= 4-7n

a1=4-7(1)=4-7

a1=first term=-3

a2=4-7(2)=4-14

a2=-10

d=a2-a1= -10-(-3)

d=-10+3

d= common difference=-7