Find the value of a30 -a20 for the ap 4,7,10...
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Answer:hi
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A. P. : 4,7,10...
Step-by-step explanation:
Given,
a=4
d= a2-a1
= 7-4
=3
:- a30= a+29d :- a20= a +19d
= 4+29×3 = 4+19×3
= 4+87 = 3+57
= 91 = 60
=> a30-a20
=> 91-60
=> 31
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