Question

Find the 30th and 60th term of -10,-7,-4,-1...

Answer 1

here's the answer to this question

Answer 2

Given AP:-

-10,-7,-4,-1.....

Here , a1 = -10 and a2 = -7

So , to find Common Difference we will subtract a2 from a1

So , a2 -a1 => -7 -(-10) => -7 + 10 => 3

By the formula :- [ A(n) = a + (n-1)d ]

We have :-

30th term of this AP:-

a(30) = -10 + (30-1)3

=> -10 + 29x3

=> -10 + 87

=> 77

also

60th term of this AP:-

a(60) = -10 + (60-1)3

=> -10 + 59x3

=> -10 + 177

=> 167

Hope it helped you...