Question

If the common difference of an A.P. is - 6, find a 16-a12​

Answer 1

Answer:

Step-by-step explanation:

Given, d=−6

a  

16

​  

=a+15d

a  

12

​  

=a+11d

a  

16

​  

−a  

12

​  

=(a+15d)−(a+11d)=4d

∴a  

16

​  

−a  

12

​  

=4×−6=−24

Answer 2

Answer:

your answer is -24

Step-by-step explanation:

the explanation is

Given,

d= -6

so,

an= a+ (n-1) d

a16 = a + (16-1)(-6)

a16 = a - 90

similarly,

a12= a-66

to find

a16 - a12

putting the values of a16 and a12

we get,

a - 90 - (a - 66)

= a - 90 - a + 66

= -90 +66              [-a and +a gets cancelled]

= -24

here is your answer

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