Question

If q-1, q+3, 3q-1 are in Ap , then q is equal to 4,-4,2,-2?
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Answer 1

Step-by-step explanation:

2p+3q=18⟹p=218−3q4p2+4pq−3q2−36=0 

⟹4(218−3q)2+4(218−3q)q−3q2−36=0⟹324−36=(108−36)q⟹72q=288⟹q=4⟹p=218−12=3⟹2p+q=2(3)+4=10

Answer 2

Answer:

q=4

Step-by-step explanation:

q-1, q+3, 3q-1 are in Ap

condition of AP=

2b=a+c

2(q+3)=q-1+ 3q-1

2q+6=4q-2

2q=8

q=4