1.

Find the 13th term of the A.P. -5, -10, -15,-20,....?​

Answer»

Answer:

-65

Step-by-step EXPLANATION:

Here, a=-5

d=t2-t1=-10-(-5)=-5

n=13

We know that,

tn = a+(n-1)d

Thus,

T13=-5+(13-1)-5

= -5+12×(-5)

= -5+(-60)

t13= -65



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