Question

Find a,b such that 18,a,b,-3 are in A.P​

Answer 1

11,4

Common difference is 7 if you have notice

Answer 2

Answer:

ANSWER

Formula,

a

n

=a+(n−1)d

Given,

a

4

=18+(4−1)d

−3=18+3d

∴d=−7

a=18+d=18−7=11

b=a+d=11−7=4

Step-by-step explanation:

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