Maths / Arithmetic Progression / General Term Of an AP

QUESTION
 

Find the general term of an AP -21,-17,-13,.....

 

OPTIONS
A. 

3n-25

B. 


3n-25

C. 


4n-25

D. 

4n+25

Right Option : C

EXPLANATION
Explain TypeExplanation Content
Text

large a=-21, d= 4

large a_n=a+(n-1)d

large a_n= -21+(n-1)4= -21+4n-4=4n-25

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