Find the number of terms If AP is12,18,24,30----120
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Step-by-step explanation:
19 is the correct answer
Answered by
0
Step-by-step explanation:
a=12
d=18-12
=6
An = 120
n =?
An = a+(n-1) d
120= 12+(n-1)6
120= 12+6n-6
120=6+6n
6n=120-6
6n=114
n = 114/6
n = 19
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