Question

The 6th term of an ap is -10and its 10th term is -26find its 15th term

Answer 1

Step-by-step explanation:

Let 1st term of ap be "a" and common difference be "d".

ATQ,a+5d=-10 and a+9d=-26

On solving these two equations,we get d=-4 and a=10

Now 15 th term=a+14d=10+14×(-4)=10-56=-46