Question

How many terms are there in the sequence of 3,6,9,....... 300​

Answer 1

• Here a=3
• d=3

$\\ \sf\longmapsto T_n=300$

$\\ \sf\longmapsto a+(n-1)d=300$

$\\ \sf\longmapsto 3+(n-1)3=300$

$\\ \sf\longmapsto 3n-3+3=300$

$\\ \sf\longmapsto 3n=300$

$\\ \sf\longmapsto n=\dfrac{300}{3}$

$\\ \sf\longmapsto n=100$