1.

If 18 , a , b , -3 are in A.P,then find a+b.

Answer»

ong>Answer:

a=11

b=4

Step-by-step EXPLANATION:

Diff BW 18 and -3 is 21. There are 3 equal spaces between them. So length of each space would be 21/3=7.

So, a=18-7=11

b=11-6=4



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