Math, asked by prathmeshsable88, 6 months ago

4. The 1st term of an A.P. is -54 and 16th term is 21. Find the 12th term.

Answers

Answered by aryan180296

3

Answer:

-31/2

Step-by-step explanation:

a21=a+20d=16

-54+20d=16

20d=16+54

20d=70

d=70/20=7/2

a12=a+11d

-54+11*7/2=-54+77/2

-108+77/2=-31/2

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