Question

check whether given numbers are as term of the given A.P 3,7,11 ,15​

Answer 1

here
AP is 3,7,11,15
t1=3,t2=7,t3=11,t4=15
t2-t1=7-3=4
t3-t2=11-7=4
t4-t3=15-11=4

here
common difference is 4

therefore
its all term of AP

Answer 2

Answer:

Step-by-step explanation:

In a Given A.P ;

a = 3

d = 7-3 = 4

On the contrary let 144 be the nth term of A.P

Tn = 144

n = ?

Tn = a+(n-1)d

144 = 3+(n-1)4

n-1 = 141/4

n = 35.25+1

n = 36.25

As the value of n is a decimal or number, hence 144 is not the term of given A.P