Question

(b) Which term of the A.P. 148, 146, 144, ... is 30?
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Answer 1

Answer:

30 is equal to 148+(n-1)-2

108 is equal to -2n+2

90 term is 30.....

Answer 2

Answer:

an=a+(n-1)d

a=148 , d=146-148= -2 , an=30

now putting the values,

148+(n-1)-2=30

148+(-2n)+2=30

150-2n=30

-2n=30-150

-2n= -120

n=-120/-2

n=60

Hence, 60th term of the above A.P is 30