Question

For anAP - 3, - 7 ,- 11...... find the value of t30 - t20 without finding the actual value of t30 and t20

Answer 1

Answer:

-40

Step-by-step explanation:

d=a2-a1

then t30-t20

then expand these t30 and T20

then you will left with 10×d

then put value of d and your answer will come